Hi there, thanks for your insights and for diving deeper into this Paul! For me, the users ending up in 'Waiting for dsync to finish' all have more than 256 Imap folders as well (ranging from 288 up to >5500; as per 'doveadm mailbox list -u <username> | wc -l'). For more details on my setup please see my post from February [1]. @Arnaud: What OS are you running on? Best Sebastian [1] https://dovecot.org/pipermail/dovecot/2022-February/124168.html On 4/24/22 19:36, Paul Kudla (SCOM.CA Internet Services Inc.) wrote:> > Question having similiar replication issues > > pls read everything below and advise the folder counts on the > non-replicated users? > > i find? the total number of folders / account seems to be a factor and > NOT the size of the mail box > > ie i have customers with 40G of emails no problem over 40 or so folders > and it works ok > > 300+ folders seems to be the issue > > i have been going through the replication code > > no errors being logged > > i am assuming that the replication --> dhclient --> other server is > timing out or not reading the folder lists correctly (ie dies after X > folders read) > > thus i am going through the code patching for log entries etc to find > the issues. > > see > > [13:33:57] mail18.scom.ca [root:0] /usr/local/var/lib/dovecot > # ll > total 86 > drwxr-xr-x? 2 root? wheel? uarch??? 4B Apr 24 11:11 . > drwxr-xr-x? 4 root? wheel? uarch??? 4B Mar? 8? 2021 .. > -rw-r--r--? 1 root? wheel? uarch?? 73B Apr 24 11:11 instances > -rw-r--r--? 1 root? wheel? uarch? 160K Apr 24 13:33 replicator.db > > [13:33:58] mail18.scom.ca [root:0] /usr/local/var/lib/dovecot > # > > replicator.db seems to get updated ok but never processed properly. > > # sync.users > nick at elirpa.com?????????????????? high???? 00:09:41? 463:47:01 - ??? y > keith at elirpa.com????????????????? high???? 00:09:23? 463:45:43 - ??? y > paul at scom.ca????????????????????? high???? 00:09:41? 463:46:51 - ??? y > ed at scom.ca??????????????????????? high???? 00:09:43? 463:47:01 - ??? y > ed.hanna at dssmgmt.com????????????? high???? 00:09:42? 463:46:58 - ??? y > paul at paulkudla.net??????????????? high???? 00:09:44? 463:47:03 580:35:07 > ?? y > > > > > so .... > > > > two things : > > first to get the production stuff to work i had to write a script that > whould find the bad sync's and the force a dsync between the servers > > i run this every five minutes or each server. > > in crontab > > */10??? *??????????????? *??? *??? *??? root??????????? /usr/bin/nohup > /programs/common/sync.recover > /dev/null > > > python script to sort things out > > # cat /programs/common/sync.recover > #!/usr/local/bin/python3 > > #Force sync between servers that are reporting bad? > > import os,sys,django,socket > from optparse import OptionParser > > > from lib import * > > #Sample Re-Index MB > #doveadm -D force-resync -u paul at scom.ca -f INBOX* > > > > USAGE_TEXT = '''\ > usage: %%prog %s[options] > ''' > > parser = OptionParser(usage=USAGE_TEXT % '', version='0.4') > > parser.add_option("-m", "--send_to", dest="send_to", help="Send Email To") > parser.add_option("-e", "--email", dest="email_box", help="Box to Index") > parser.add_option("-d", "--detail",action='store_true', > dest="detail",default =False, help="Detailed report") > parser.add_option("-i", "--index",action='store_true', > dest="index",default =False, help="Index") > > options, args = parser.parse_args() > > print (options.email_box) > print (options.send_to) > print (options.detail) > > #sys.exit() > > > > print ('Getting Current User Sync Status') > command = commands("/usr/local/bin/doveadm replicator status '*'") > > > #print command > > sync_user_status = command.output.split('\n') > > #print sync_user_status > > synced = [] > > for n in range(1,len(sync_user_status)) : > ??????? user = sync_user_status[n] > ??????? print ('Processing User : %s' %user.split(' ')[0]) > ??????? if user.split(' ')[0] != options.email_box : > ??????????????? if options.email_box != None : > ??????????????????????? continue > > ??????? if options.index == True : > ??????????????? command = '/usr/local/bin/doveadm -D force-resync -u %s > -f INBOX*' %user.split(' ')[0] > ??????????????? command = commands(command) > ??????????????? command = command.output > > ??????? #print user > ??????? for nn in range (len(user)-1,0,-1) : > ??????????????? #print nn > ??????????????? #print user[nn] > > ??????????????? if user[nn] == '-' : > ??????????????????????? #print 'skipping ... %s' %user.split(' ')[0] > > ??????????????????????? break > > > > ??????????????? if user[nn] == 'y': #Found a Bad Mailbox > ??????????????????????? print ('syncing ... %s' %user.split(' ')[0]) > > > ??????????????????????? if options.detail == True : > ??????????????????????????????? command = '/usr/local/bin/doveadm -D > sync -u %s -d -N -l 30 -U' %user.split(' ')[0] > ??????????????????????????????? print (command) > ??????????????????????????????? command = commands(command) > ??????????????????????????????? command = command.output.split('\n') > ??????????????????????????????? print (command) > ??????????????????????????????? print ('Processed Mailbox for ... %s' > %user.split(' ')[0] ) > ??????????????????????????????? synced.append('Processed Mailbox for ... > %s' %user.split(' ')[0]) > ??????????????????????????????? for nnn in range(len(command)): > ??????????????????????????????????????? synced.append(command[nnn] + '\n') > ??????????????????????????????? break > > > ??????????????????????? if options.detail == False : > ??????????????????????????????? #command = '/usr/local/bin/doveadm -D > sync -u %s -d -N -l 30 -U' %user.split(' ')[0] > ??????????????????????????????? #print (command) > ??????????????????????????????? #command = os.system(command) > ??????????????????????????????? command = subprocess.Popen( > ["/usr/local/bin/doveadm sync -u %s -d -N -l 30 -U" %user.split(' ')[0] > ], \ > ??????????????????????????????? shell = True, stdin=None, stdout=None, > stderr=None, close_fds=True) > > ??????????????????????????????? print ( 'Processed Mailbox for ... %s' > %user.split(' ')[0] ) > ??????????????????????????????? synced.append('Processed Mailbox for ... > %s' %user.split(' ')[0]) > ??????????????????????????????? #sys.exit() > ??????????????????????????????? break > > if len(synced) != 0 : > ??????? #send email showing bad synced boxes ? > > ??????? if options.send_to != None : > ??????????????? send_from = 'monitor at scom.ca' > ??????????????? send_to = ['%s' %options.send_to] > ??????????????? send_subject = 'Dovecot Bad Sync Report for : %s' > %(socket.gethostname()) > ??????????????? send_text = '\n\n' > ??????????????? for n in range (len(synced)) : > ??????????????????????? send_text = send_text + synced[n] + '\n' > > ??????????????? send_files = [] > ??????????????? sendmail (send_from, send_to, send_subject, send_text, > send_files) > > > > sys.exit() > > second : > > i posted this a month ago - no response > > please appreciate that i am trying to help .... > > after much testing i can now reporduce the replication issues at hand > > I am running on freebsd 12 & 13 stable (both test and production servers) > > sdram drives etc ... > > Basically replication works fine until reaching a folder quantity of ~ > 256 or more > > to reproduce using doveadm i created folders like > > INBOX/folder-0 > INBOX/folder-1 > INBOX/folder-2 > INBOX/folder-3 > and so forth ...... > > I created 200 folders and they replicated ok on both servers > > I created another 200 (400 total) and the replicator got stuck and would > not update the mbox on the alternate server anymore and is still > updating 4 days later ? > > basically replicator goes so far and either hangs or more likely bails > on an error that is not reported to the debug reporting ? > > however dsync will sync the two servers but only when run manually (ie > all the folders will sync) > > I have two test servers avaliable if you need any kind of access - again > here to help. > > [07:28:42] mail18.scom.ca [root:0] ~ > # sync.status > Queued 'sync' requests??????? 0 > Queued 'high' requests??????? 6 > Queued 'low' requests???????? 0 > Queued 'failed' requests????? 0 > Queued 'full resync' requests 0 > Waiting 'failed' requests???? 0 > Total number of known users?? 255 > > username?????????????????????? type??????? status > paul at scom.ca?????????????????? normal????? Waiting for dsync to finish > keith at elirpa.com?????????????? incremental Waiting for dsync to finish > ed.hanna at dssmgmt.com?????????? incremental Waiting for dsync to finish > ed at scom.ca???????????????????? incremental Waiting for dsync to finish > nick at elirpa.com??????????????? incremental Waiting for dsync to finish > paul at paulkudla.net???????????? incremental Waiting for dsync to finish > > > i have been going through the c code and it seems the replication gets > requested ok > > replicator.db does get updated ok with the replicated request for the > mbox in question. > > however i am still looking for the actual replicator function in the > lib's that do the actual replication requests > > the number of folders & subfolders is defanately the issue - not the > mbox pyhsical size as thought origionally. > > if someone can point me in the right direction, it seems either the > replicator is not picking up on the number of folders to replicat > properly or it has a hard set limit like 256 / 512 / 65535 etc and stops > the replication request thereafter. > > I am mainly a machine code programmer from the 80's and have > concentrated on python as of late, 'c' i am starting to go through just > to give you a background on my talents. > > It took 2 months to finger this out. > > this issue also seems to be indirectly causing the duplicate messages > supression not to work as well. > > python programming to reproduce issue (loops are for last run started @ > 200 - fyi) : > > # cat mbox.gen > #!/usr/local/bin/python2 > > import os,sys > > from lib import * > > > user = 'paul at paulkudla.net' > > """ > for count in range (0,600) : > ??????? box = 'INBOX/folder-%s' %count > ??????? print count > ??????? command = '/usr/local/bin/doveadm mailbox create -s -u %s %s' > %(user,box) > ??????? print command > ??????? a = commands.getoutput(command) > ??????? print a > """ > > for count in range (0,600) : > ??????? box = 'INBOX/folder-0/sub-%' %count > ??????? print count > ??????? command = '/usr/local/bin/doveadm mailbox create -s -u %s %s' > %(user,box) > ??????? print command > ??????? a = commands.getoutput(command) > ??????? print a > > > > ??????? #sys.exit() > > > > > > Happy Sunday !!! > Thanks - paul > > Paul Kudla > > > Scom.ca Internet Services <http://www.scom.ca> > 004-1009 Byron Street South > Whitby, Ontario - Canada > L1N 4S3 > > Toronto 416.642.7266 > Main?1.866.411.7266 > Fax?1.888.892.7266 > > On 4/24/2022 10:22 AM, Arnaud Ab?lard wrote: >> Hello, >> >> I am working on replicating a server (and adding compression on the >> other side) and since I had "Error: dsync I/O has stalled, no activity >> for 600 seconds (version not received)" errors I upgraded both source >> and destination server with the latest 2.3 version (2.3.18). While >> before the upgrade all the 15 replication connections were busy after >> upgrading dovecot replicator dsync-status shows that most of the time >> nothing is being replicated at all. I can see some brief replications >> that last, but 99,9% of the time nothing is happening at all. >> >> I have a replication_full_sync_interval of 12 hours but I have >> thousands of users with their last full sync over 90 hours ago. >> >> "doveadm replicator status" also shows that i have over 35,000 queued >> full resync requests, but no sync, high or low queued requests so why >> aren't the full requests occuring? >> >> There are no errors in the logs. >> >> Thanks, >> >> Arnaud >> >> >> >> >>
Hello, On my side we are running Linux (Debian Buster). I'm not sure my problem is actually the same as Paul or you Sebastian since I have a lot of boxes but those are actually small (quota of 110MB) so I doubt any of them have more than a dozen imap folders. The main symptom is that I have tons of full sync requests awaiting but even though no other sync is pending the replicator just waits for something to trigger those syncs. Today, with users back I can see that normal and incremental syncs are being done on the 15 connections, with an occasional full sync here or there and lots of "Waiting 'failed' requests": Queued 'sync' requests 0 Queued 'high' requests 0 Queued 'low' requests 0 Queued 'failed' requests 122 Queued 'full resync' requests 28785 Waiting 'failed' requests 4294 Total number of known users 42512 So, why didn't the replicator take advantage of the weekend to replicate the mailboxes while no user were using them? Arnaud On 25/04/2022 13:54, Sebastian Marske wrote:> Hi there, > > thanks for your insights and for diving deeper into this Paul! > > For me, the users ending up in 'Waiting for dsync to finish' all have > more than 256 Imap folders as well (ranging from 288 up to >5500; as per > 'doveadm mailbox list -u <username> | wc -l'). For more details on my > setup please see my post from February [1]. > > @Arnaud: What OS are you running on? > > > Best > Sebastian > > > [1] https://dovecot.org/pipermail/dovecot/2022-February/124168.html > > > On 4/24/22 19:36, Paul Kudla (SCOM.CA Internet Services Inc.) wrote: >> >> Question having similiar replication issues >> >> pls read everything below and advise the folder counts on the >> non-replicated users? >> >> i find? the total number of folders / account seems to be a factor and >> NOT the size of the mail box >> >> ie i have customers with 40G of emails no problem over 40 or so folders >> and it works ok >> >> 300+ folders seems to be the issue >> >> i have been going through the replication code >> >> no errors being logged >> >> i am assuming that the replication --> dhclient --> other server is >> timing out or not reading the folder lists correctly (ie dies after X >> folders read) >> >> thus i am going through the code patching for log entries etc to find >> the issues. >> >> see >> >> [13:33:57] mail18.scom.ca [root:0] /usr/local/var/lib/dovecot >> # ll >> total 86 >> drwxr-xr-x? 2 root? wheel? uarch??? 4B Apr 24 11:11 . >> drwxr-xr-x? 4 root? wheel? uarch??? 4B Mar? 8? 2021 .. >> -rw-r--r--? 1 root? wheel? uarch?? 73B Apr 24 11:11 instances >> -rw-r--r--? 1 root? wheel? uarch? 160K Apr 24 13:33 replicator.db >> >> [13:33:58] mail18.scom.ca [root:0] /usr/local/var/lib/dovecot >> # >> >> replicator.db seems to get updated ok but never processed properly. >> >> # sync.users >> nick at elirpa.com?????????????????? high???? 00:09:41? 463:47:01 - ??? y >> keith at elirpa.com????????????????? high???? 00:09:23? 463:45:43 - ??? y >> paul at scom.ca????????????????????? high???? 00:09:41? 463:46:51 - ??? y >> ed at scom.ca??????????????????????? high???? 00:09:43? 463:47:01 - ??? y >> ed.hanna at dssmgmt.com????????????? high???? 00:09:42? 463:46:58 - ??? y >> paul at paulkudla.net??????????????? high???? 00:09:44? 463:47:03 580:35:07 >> ?? y >> >> >> >> >> so .... >> >> >> >> two things : >> >> first to get the production stuff to work i had to write a script that >> whould find the bad sync's and the force a dsync between the servers >> >> i run this every five minutes or each server. >> >> in crontab >> >> */10??? *??????????????? *??? *??? *??? root??????????? /usr/bin/nohup >> /programs/common/sync.recover > /dev/null >> >> >> python script to sort things out >> >> # cat /programs/common/sync.recover >> #!/usr/local/bin/python3 >> >> #Force sync between servers that are reporting bad? >> >> import os,sys,django,socket >> from optparse import OptionParser >> >> >> from lib import * >> >> #Sample Re-Index MB >> #doveadm -D force-resync -u paul at scom.ca -f INBOX* >> >> >> >> USAGE_TEXT = '''\ >> usage: %%prog %s[options] >> ''' >> >> parser = OptionParser(usage=USAGE_TEXT % '', version='0.4') >> >> parser.add_option("-m", "--send_to", dest="send_to", help="Send Email To") >> parser.add_option("-e", "--email", dest="email_box", help="Box to Index") >> parser.add_option("-d", "--detail",action='store_true', >> dest="detail",default =False, help="Detailed report") >> parser.add_option("-i", "--index",action='store_true', >> dest="index",default =False, help="Index") >> >> options, args = parser.parse_args() >> >> print (options.email_box) >> print (options.send_to) >> print (options.detail) >> >> #sys.exit() >> >> >> >> print ('Getting Current User Sync Status') >> command = commands("/usr/local/bin/doveadm replicator status '*'") >> >> >> #print command >> >> sync_user_status = command.output.split('\n') >> >> #print sync_user_status >> >> synced = [] >> >> for n in range(1,len(sync_user_status)) : >> ??????? user = sync_user_status[n] >> ??????? print ('Processing User : %s' %user.split(' ')[0]) >> ??????? if user.split(' ')[0] != options.email_box : >> ??????????????? if options.email_box != None : >> ??????????????????????? continue >> >> ??????? if options.index == True : >> ??????????????? command = '/usr/local/bin/doveadm -D force-resync -u %s >> -f INBOX*' %user.split(' ')[0] >> ??????????????? command = commands(command) >> ??????????????? command = command.output >> >> ??????? #print user >> ??????? for nn in range (len(user)-1,0,-1) : >> ??????????????? #print nn >> ??????????????? #print user[nn] >> >> ??????????????? if user[nn] == '-' : >> ??????????????????????? #print 'skipping ... %s' %user.split(' ')[0] >> >> ??????????????????????? break >> >> >> >> ??????????????? if user[nn] == 'y': #Found a Bad Mailbox >> ??????????????????????? print ('syncing ... %s' %user.split(' ')[0]) >> >> >> ??????????????????????? if options.detail == True : >> ??????????????????????????????? command = '/usr/local/bin/doveadm -D >> sync -u %s -d -N -l 30 -U' %user.split(' ')[0] >> ??????????????????????????????? print (command) >> ??????????????????????????????? command = commands(command) >> ??????????????????????????????? command = command.output.split('\n') >> ??????????????????????????????? print (command) >> ??????????????????????????????? print ('Processed Mailbox for ... %s' >> %user.split(' ')[0] ) >> ??????????????????????????????? synced.append('Processed Mailbox for ... >> %s' %user.split(' ')[0]) >> ??????????????????????????????? for nnn in range(len(command)): >> ??????????????????????????????????????? synced.append(command[nnn] + '\n') >> ??????????????????????????????? break >> >> >> ??????????????????????? if options.detail == False : >> ??????????????????????????????? #command = '/usr/local/bin/doveadm -D >> sync -u %s -d -N -l 30 -U' %user.split(' ')[0] >> ??????????????????????????????? #print (command) >> ??????????????????????????????? #command = os.system(command) >> ??????????????????????????????? command = subprocess.Popen( >> ["/usr/local/bin/doveadm sync -u %s -d -N -l 30 -U" %user.split(' ')[0] >> ], \ >> ??????????????????????????????? shell = True, stdin=None, stdout=None, >> stderr=None, close_fds=True) >> >> ??????????????????????????????? print ( 'Processed Mailbox for ... %s' >> %user.split(' ')[0] ) >> ??????????????????????????????? synced.append('Processed Mailbox for ... >> %s' %user.split(' ')[0]) >> ??????????????????????????????? #sys.exit() >> ??????????????????????????????? break >> >> if len(synced) != 0 : >> ??????? #send email showing bad synced boxes ? >> >> ??????? if options.send_to != None : >> ??????????????? send_from = 'monitor at scom.ca' >> ??????????????? send_to = ['%s' %options.send_to] >> ??????????????? send_subject = 'Dovecot Bad Sync Report for : %s' >> %(socket.gethostname()) >> ??????????????? send_text = '\n\n' >> ??????????????? for n in range (len(synced)) : >> ??????????????????????? send_text = send_text + synced[n] + '\n' >> >> ??????????????? send_files = [] >> ??????????????? sendmail (send_from, send_to, send_subject, send_text, >> send_files) >> >> >> >> sys.exit() >> >> second : >> >> i posted this a month ago - no response >> >> please appreciate that i am trying to help .... >> >> after much testing i can now reporduce the replication issues at hand >> >> I am running on freebsd 12 & 13 stable (both test and production servers) >> >> sdram drives etc ... >> >> Basically replication works fine until reaching a folder quantity of ~ >> 256 or more >> >> to reproduce using doveadm i created folders like >> >> INBOX/folder-0 >> INBOX/folder-1 >> INBOX/folder-2 >> INBOX/folder-3 >> and so forth ...... >> >> I created 200 folders and they replicated ok on both servers >> >> I created another 200 (400 total) and the replicator got stuck and would >> not update the mbox on the alternate server anymore and is still >> updating 4 days later ? >> >> basically replicator goes so far and either hangs or more likely bails >> on an error that is not reported to the debug reporting ? >> >> however dsync will sync the two servers but only when run manually (ie >> all the folders will sync) >> >> I have two test servers avaliable if you need any kind of access - again >> here to help. >> >> [07:28:42] mail18.scom.ca [root:0] ~ >> # sync.status >> Queued 'sync' requests??????? 0 >> Queued 'high' requests??????? 6 >> Queued 'low' requests???????? 0 >> Queued 'failed' requests????? 0 >> Queued 'full resync' requests 0 >> Waiting 'failed' requests???? 0 >> Total number of known users?? 255 >> >> username?????????????????????? type??????? status >> paul at scom.ca?????????????????? normal????? Waiting for dsync to finish >> keith at elirpa.com?????????????? incremental Waiting for dsync to finish >> ed.hanna at dssmgmt.com?????????? incremental Waiting for dsync to finish >> ed at scom.ca???????????????????? incremental Waiting for dsync to finish >> nick at elirpa.com??????????????? incremental Waiting for dsync to finish >> paul at paulkudla.net???????????? incremental Waiting for dsync to finish >> >> >> i have been going through the c code and it seems the replication gets >> requested ok >> >> replicator.db does get updated ok with the replicated request for the >> mbox in question. >> >> however i am still looking for the actual replicator function in the >> lib's that do the actual replication requests >> >> the number of folders & subfolders is defanately the issue - not the >> mbox pyhsical size as thought origionally. >> >> if someone can point me in the right direction, it seems either the >> replicator is not picking up on the number of folders to replicat >> properly or it has a hard set limit like 256 / 512 / 65535 etc and stops >> the replication request thereafter. >> >> I am mainly a machine code programmer from the 80's and have >> concentrated on python as of late, 'c' i am starting to go through just >> to give you a background on my talents. >> >> It took 2 months to finger this out. >> >> this issue also seems to be indirectly causing the duplicate messages >> supression not to work as well. >> >> python programming to reproduce issue (loops are for last run started @ >> 200 - fyi) : >> >> # cat mbox.gen >> #!/usr/local/bin/python2 >> >> import os,sys >> >> from lib import * >> >> >> user = 'paul at paulkudla.net' >> >> """ >> for count in range (0,600) : >> ??????? box = 'INBOX/folder-%s' %count >> ??????? print count >> ??????? command = '/usr/local/bin/doveadm mailbox create -s -u %s %s' >> %(user,box) >> ??????? print command >> ??????? a = commands.getoutput(command) >> ??????? print a >> """ >> >> for count in range (0,600) : >> ??????? box = 'INBOX/folder-0/sub-%' %count >> ??????? print count >> ??????? command = '/usr/local/bin/doveadm mailbox create -s -u %s %s' >> %(user,box) >> ??????? print command >> ??????? a = commands.getoutput(command) >> ??????? print a >> >> >> >> ??????? #sys.exit() >> >> >> >> >> >> Happy Sunday !!! >> Thanks - paul >> >> Paul Kudla >> >> >> Scom.ca Internet Services <http://www.scom.ca> >> 004-1009 Byron Street South >> Whitby, Ontario - Canada >> L1N 4S3 >> >> Toronto 416.642.7266 >> Main?1.866.411.7266 >> Fax?1.888.892.7266 >> >> On 4/24/2022 10:22 AM, Arnaud Ab?lard wrote: >>> Hello, >>> >>> I am working on replicating a server (and adding compression on the >>> other side) and since I had "Error: dsync I/O has stalled, no activity >>> for 600 seconds (version not received)" errors I upgraded both source >>> and destination server with the latest 2.3 version (2.3.18). While >>> before the upgrade all the 15 replication connections were busy after >>> upgrading dovecot replicator dsync-status shows that most of the time >>> nothing is being replicated at all. I can see some brief replications >>> that last, but 99,9% of the time nothing is happening at all. >>> >>> I have a replication_full_sync_interval of 12 hours but I have >>> thousands of users with their last full sync over 90 hours ago. >>> >>> "doveadm replicator status" also shows that i have over 35,000 queued >>> full resync requests, but no sync, high or low queued requests so why >>> aren't the full requests occuring? >>> >>> There are no errors in the logs. >>> >>> Thanks, >>> >>> Arnaud >>> >>> >>> >>> >>>-- Arnaud Ab?lard Responsable p?le Syst?me et Stockage Service Infrastructures DSIN Universit? de Nantes - -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 4186 bytes Desc: S/MIME Cryptographic Signature URL: <https://dovecot.org/pipermail/dovecot/attachments/20220425/d0ca1f04/attachment-0001.bin>
Paul Kudla (SCOM.CA Internet Services Inc.)
2022-Apr-26 09:43 UTC
no full syncs after upgrading to dovecot 2.3.18
ok until someone fixes the folder count (or i figure that out)
the errors will stay on the replicator side and i use that error
(knowing they are not replicating) coming back to trigger a background
dsync with a python script through doveadm (seems to work)
but this is a hack.
[05:41:37] mail18.scom.ca [root:0] /programs/lib
# sync.users
nick at elirpa.com high 00:06:41 503:54:00 -
y
keith at elirpa.com high 00:06:20 503:52:42 -
y
paul at scom.ca high 00:06:40 503:53:50 -
y
ed at scom.ca high 00:06:42 503:54:00 -
y
ed.hanna at dssmgmt.com high 00:06:41 503:53:57 -
y
paul at paulkudla.net high 00:06:43 503:54:02 620:42:06
y
[05:41:46] mail18.scom.ca [root:0] /programs/lib
# cat /programs/common/sync.users
doveadm replicator status '*' | grep ' y'
crontab :
*/10 * * * * root /usr/bin/nohup
/programs/common/sync.recover > /dev/null
# cat /programs/common/sync.recover
#!/usr/local/bin/python3
#Force sync between servers that are reporting bad?
import os,sys,django,socket
from optparse import OptionParser
from lib import *
#Sample Re-Index MB
#doveadm -D force-resync -u paul at scom.ca -f INBOX*
USAGE_TEXT = '''\
usage: %%prog %s[options]
'''
parser = OptionParser(usage=USAGE_TEXT % '', version='0.4')
parser.add_option("-m", "--send_to",
dest="send_to", help="Send Email To")
parser.add_option("-e", "--email",
dest="email_box", help="Box to Index")
parser.add_option("-d",
"--detail",action='store_true',
dest="detail",default =False, help="Detailed report")
parser.add_option("-i",
"--index",action='store_true',
dest="index",default =False, help="Index")
options, args = parser.parse_args()
print (options.email_box)
print (options.send_to)
print (options.detail)
#sys.exit()
print ('Getting Current User Sync Status')
command = commands("/usr/local/bin/doveadm replicator status
'*'")
#print command
sync_user_status = command.output.split('\n')
#print sync_user_status
synced = []
for n in range(1,len(sync_user_status)) :
user = sync_user_status[n]
print ('Processing User : %s' %user.split(' ')[0])
if user.split(' ')[0] != options.email_box :
if options.email_box != None :
continue
if options.index == True :
command = '/usr/local/bin/doveadm -D force-resync -u %s
-f INBOX*' %user.split(' ')[0]
command = commands(command)
command = command.output
#print user
for nn in range (len(user)-1,0,-1) :
#print nn
#print user[nn]
if user[nn] == '-' :
#print 'skipping ... %s' %user.split('
')[0]
break
if user[nn] == 'y': #Found a Bad Mailbox
print ('syncing ... %s' %user.split('
')[0])
if options.detail == True :
command = '/usr/local/bin/doveadm -D
sync -u %s -d -N -l 30 -U' %user.split(' ')[0]
print (command)
command = commands(command)
command = command.output.split('\n')
print (command)
print ('Processed Mailbox for ... %s'
%user.split(' ')[0] )
synced.append('Processed Mailbox for
... %s' %user.split(' ')[0])
for nnn in range(len(command)):
synced.append(command[nnn] +
'\n')
break
if options.detail == False :
#command = '/usr/local/bin/doveadm -D
sync -u %s -d -N -l 30 -U' %user.split(' ')[0]
#print (command)
#command = os.system(command)
command = subprocess.Popen(
["/usr/local/bin/doveadm sync -u %s -d -N -l 30 -U" %user.split('
')[0] ], \
shell = True, stdin=None, stdout=None,
stderr=None, close_fds=True)
print ( 'Processed Mailbox for ... %s'
%user.split(' ')[0] )
synced.append('Processed Mailbox for
... %s' %user.split(' ')[0])
#sys.exit()
break
if len(synced) != 0 :
#send email showing bad synced boxes ?
if options.send_to != None :
send_from = 'monitor at scom.ca'
send_to = ['%s' %options.send_to]
send_subject = 'Dovecot Bad Sync Report for : %s'
%(socket.gethostname())
send_text = '\n\n'
for n in range (len(synced)) :
send_text = send_text + synced[n] + '\n'
send_files = []
sendmail (send_from, send_to, send_subject, send_text,
send_files)
sys.exit()
Lib3 (lib.py) my general libary load
# cat lib3.py
#Python Library written by paul kudla (c) 2011
#Load the librarys for the system
import os,sys,time,socket
import string
from ftplib import FTP
from decimal import *
from datetime import date
import datetime
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.mime.text import MIMEText
from email.utils import COMMASPACE, formatdate
from email import encoders
import subprocess
getcontext().prec = 20
class commands:
def __init__(self,command) :
self.command = command
#print (self.command)
self.output = 'Error'
self.status = '255'
#sample
#rc, gopath = subprocess.getstatusoutput('ls -a')
self.status, self.output =
subprocess.getstatusoutput(self.command)
try:
self.cr = self.output.split('\n')
except :
self.cr = []
try:
self.count = len(self.cr)
except :
self.count = 0
self.status = int(self.status)
#return count=number of lines, cr = lines split,
getoutput = actual output returned, status = return code
return
#Email with attachment
class sendmail:
def __init__(self, send_from, send_to, send_subject, send_text,
send_files):
#send_from, send_to, send_subject, send_text, send_files):
#print ('lib.py sending email')
assert type(send_to)==list
assert type(send_files)==list
msg = MIMEMultipart()
msg['From'] = send_from
msg['To'] = COMMASPACE.join(send_to)
msg['Date'] = formatdate(localtime=True)
msg['Subject'] = send_subject
msg.attach( MIMEText(send_text) )
for f in send_files:
part = MIMEBase('application',
"octet-stream")
part.set_payload( open(f,"rb").read() )
Encoders.encode_base64(part)
part.add_header('Content-Disposition',
'attachment; filename="%s"' % os.path.basename(f))
msg.attach(part)
try : #Send Local?
smtp = smtplib.SMTP('mail.local.scom.ca')
#smtp.login('backup at
scom.ca','522577')
#print ('Sending Email to : %s' %send_to)
smtp.sendmail(send_from, send_to, msg.as_string())
smtp.close()
except :
smtp = smtplib.SMTP('mail.scom.ca')
smtp.login('backup at
scom.ca','522577')
#print ('Sending Email to : %s' %send_to)
smtp.sendmail(send_from, send_to, msg.as_string())
smtp.close()
class getdatetime:
def __init__(self):
self.datetime = datetime.date.today()
self.datetime_now = datetime.datetime.now()
self.date = str( time.strftime("%Y-%m-%d %H:%M:%S") )
self.date_long = str( time.strftime("%Y-%m-%d
%H:%M:%S") )
self.date_short = str( time.strftime("%Y-%m-%d") )
self.time = str( time.strftime("%H:%M:%S") )
self.date_time_sec = self.datetime_now.strftime
("%Y-%m-%d %H:%M:%S.%f")
#Return edi senddate string (short) 2011-10-31 into 111031
class create_ascii :
def __init__(self,string_data) :
self.string_data = str(string_data)
import string
self.printable = set(string.printable)
self.list = list(filter(lambda x: x in self.printable,
self.string_data))
#print (self.list)
self.ascii = ''
for n in range (0,len(self.list)) :
self.ascii = self.ascii + self.list[n]
self.ascii = str(self.ascii)
return
class edi_send_date_short:
def __init__(self, senddate):
self.date = senddate
self.result = self.date[2] + self.date[3] +
self.date[5] + self.date[6] + self.date[8] + self.date[9]
def __str__(self):
return '%s' % self.result
##Return edi senddate string (long) 2011-10-31 into 20111031
class edi_send_date_long:
def __init__(self, senddate):
self.date = senddate
self.result1 = self.date[0] + self.date[1] +
self.date[2] + self.date[3] + self.date[5] + self.date[6] + self.date[8]
+ self.date[9]
self.result2 = self.date[2] + self.date[3] +
self.date[5] + self.date[6] + self.date[8] + self.date[9]
def __str__(self):
return '%s' % (self.result1,self.result2)
class gpsdeg:
def __init__(self, dms):
self.dms = dms
self.is_positive = self.dms >= 0
self.dms = abs(self.dms)
self.minutes,self.seconds = divmod(self.dms*3600,60)
self.degrees,self.minutes = divmod(self.minutes,60)
self.degrees = self.degrees if self.is_positive else
-self.degrees
def __str__(self):
return '%s' % (self.degrees,self.minutes,self.seconds)
class degdir:
def __init__(self, degrees):
self.direction_data =
['N','348.75','11.25','NNE',
'11.25','33.75','NE','33.75','56.25','ENE',
'56.25','78.75','E','78.75','101.25','ESE','101.25','123.75','SE','123.75','146.25','SSE','146.25','168.75','S','168.75','191.25','SSW','191.25','213.75','SW','213.75','236.25','WSW','236.25','258.75','W','258.75','281.25','WNW','281.25','303.75','NW','303.75','326.25','NNW','326.25','348.75']
def __str__(self):
return '%s' % (self.direction)
class gettime:
def __init__(self):
self.uu = time.localtime()
self.todaystime = str(self.uu[3]) #get the hr
if int(self.uu[3]) < 10: #add a zero
self.todaystime = '0' + self.todaystime
if int(self.uu[4]) < 10: #add a zero in front
self.todaystime = self.todaystime
+":0"+str(self.uu[4])
else:
self.todaystime = self.todaystime
+":"+str(self.uu[4])
def __str__(self):
return self.todaystime
class array2dbstring:
def __init__(self,array):
self.data = array
for self.nn in range(0,len(self.data)):
print ('Data %s \t\t %s' %
(str(self.data[self.nn]),str( type(self.data[self.nn])) ) ) #change all
data into strings
self.a = type(self.data[self.nn])
self.a = str(self.a)
if 'Decimal' in self.a :
self.n = str(self.data[self.nn])
#self.n = self.n.lstrip("'")
#self.n = self.n.rstrip("'")
#self.data[self.nn] =
float(self.data[self.nn])
self.data[self.nn] = str('0.00')
print (self.n)
if 'NoneType' in self.a :
self.data[self.nn] = ''
if 'datetime.datetime' in self.a :
#self.data[self.nn] =
str(self.data[self.nn])
#self.data[self.nn].replace
self.data[self.nn] = '2012-01-25
00:00:00'
self.data = str(self.data)
self.data = self.data.lstrip('[')
self.data = self.data.rstrip(']')
self.data =
self.data.replace("'NULL'","NULL")
#self.data = self.data.replace(" '',",
",")
#self.data = self.data.replace("
'0.00'","'100'")
def __str__(self):
return self.data
class get_hostname:
def __init__(self):
self.hostname = socket.gethostname()
Happy Tuesday !!!
Thanks - paul
Paul Kudla
Scom.ca Internet Services <http://www.scom.ca>
004-1009 Byron Street South
Whitby, Ontario - Canada
L1N 4S3
Toronto 416.642.7266
Main?1.866.411.7266
Fax?1.888.892.7266
On 4/25/2022 7:54 AM, Sebastian Marske wrote:>
> Hi there,
>
> thanks for your insights and for diving deeper into this Paul!
>
> For me, the users ending up in 'Waiting for dsync to finish' all
have
> more than 256 Imap folders as well (ranging from 288 up to >5500; as per
> 'doveadm mailbox list -u <username> | wc -l'). For more
details on my
> setup please see my post from February [1].
>
> @Arnaud: What OS are you running on?
>
>
> Best
> Sebastian
>
>
> [1] https://dovecot.org/pipermail/dovecot/2022-February/124168.html
>
>
> On 4/24/22 19:36, Paul Kudla (SCOM.CA Internet Services Inc.) wrote:
>>
>> Question having similiar replication issues
>>
>> pls read everything below and advise the folder counts on the
>> non-replicated users?
>>
>> i find? the total number of folders / account seems to be a factor and
>> NOT the size of the mail box
>>
>> ie i have customers with 40G of emails no problem over 40 or so folders
>> and it works ok
>>
>> 300+ folders seems to be the issue
>>
>> i have been going through the replication code
>>
>> no errors being logged
>>
>> i am assuming that the replication --> dhclient --> other server
is
>> timing out or not reading the folder lists correctly (ie dies after X
>> folders read)
>>
>> thus i am going through the code patching for log entries etc to find
>> the issues.
>>
>> see
>>
>> [13:33:57] mail18.scom.ca [root:0] /usr/local/var/lib/dovecot
>> # ll
>> total 86
>> drwxr-xr-x? 2 root? wheel? uarch??? 4B Apr 24 11:11 .
>> drwxr-xr-x? 4 root? wheel? uarch??? 4B Mar? 8? 2021 ..
>> -rw-r--r--? 1 root? wheel? uarch?? 73B Apr 24 11:11 instances
>> -rw-r--r--? 1 root? wheel? uarch? 160K Apr 24 13:33 replicator.db
>>
>> [13:33:58] mail18.scom.ca [root:0] /usr/local/var/lib/dovecot
>> #
>>
>> replicator.db seems to get updated ok but never processed properly.
>>
>> # sync.users
>> nick at elirpa.com?????????????????? high???? 00:09:41? 463:47:01 - ???
y
>> keith at elirpa.com????????????????? high???? 00:09:23? 463:45:43 - ???
y
>> paul at scom.ca????????????????????? high???? 00:09:41? 463:46:51 - ???
y
>> ed at scom.ca??????????????????????? high???? 00:09:43? 463:47:01 - ???
y
>> ed.hanna at dssmgmt.com????????????? high???? 00:09:42? 463:46:58 - ???
y
>> paul at paulkudla.net??????????????? high???? 00:09:44? 463:47:03
580:35:07
>> ?? y
>>
>>
>>
>>
>> so ....
>>
>>
>>
>> two things :
>>
>> first to get the production stuff to work i had to write a script that
>> whould find the bad sync's and the force a dsync between the
servers
>>
>> i run this every five minutes or each server.
>>
>> in crontab
>>
>> */10??? *??????????????? *??? *??? *??? root??????????? /usr/bin/nohup
>> /programs/common/sync.recover > /dev/null
>>
>>
>> python script to sort things out
>>
>> # cat /programs/common/sync.recover
>> #!/usr/local/bin/python3
>>
>> #Force sync between servers that are reporting bad?
>>
>> import os,sys,django,socket
>> from optparse import OptionParser
>>
>>
>> from lib import *
>>
>> #Sample Re-Index MB
>> #doveadm -D force-resync -u paul at scom.ca -f INBOX*
>>
>>
>>
>> USAGE_TEXT = '''\
>> usage: %%prog %s[options]
>> '''
>>
>> parser = OptionParser(usage=USAGE_TEXT % '',
version='0.4')
>>
>> parser.add_option("-m", "--send_to",
dest="send_to", help="Send Email To")
>> parser.add_option("-e", "--email",
dest="email_box", help="Box to Index")
>> parser.add_option("-d",
"--detail",action='store_true',
>> dest="detail",default =False, help="Detailed
report")
>> parser.add_option("-i",
"--index",action='store_true',
>> dest="index",default =False, help="Index")
>>
>> options, args = parser.parse_args()
>>
>> print (options.email_box)
>> print (options.send_to)
>> print (options.detail)
>>
>> #sys.exit()
>>
>>
>>
>> print ('Getting Current User Sync Status')
>> command = commands("/usr/local/bin/doveadm replicator status
'*'")
>>
>>
>> #print command
>>
>> sync_user_status = command.output.split('\n')
>>
>> #print sync_user_status
>>
>> synced = []
>>
>> for n in range(1,len(sync_user_status)) :
>> ??????? user = sync_user_status[n]
>> ??????? print ('Processing User : %s' %user.split('
')[0])
>> ??????? if user.split(' ')[0] != options.email_box :
>> ??????????????? if options.email_box != None :
>> ??????????????????????? continue
>>
>> ??????? if options.index == True :
>> ??????????????? command = '/usr/local/bin/doveadm -D force-resync
-u %s
>> -f INBOX*' %user.split(' ')[0]
>> ??????????????? command = commands(command)
>> ??????????????? command = command.output
>>
>> ??????? #print user
>> ??????? for nn in range (len(user)-1,0,-1) :
>> ??????????????? #print nn
>> ??????????????? #print user[nn]
>>
>> ??????????????? if user[nn] == '-' :
>> ??????????????????????? #print 'skipping ... %s'
%user.split(' ')[0]
>>
>> ??????????????????????? break
>>
>>
>>
>> ??????????????? if user[nn] == 'y': #Found a Bad Mailbox
>> ??????????????????????? print ('syncing ... %s'
%user.split(' ')[0])
>>
>>
>> ??????????????????????? if options.detail == True :
>> ??????????????????????????????? command = '/usr/local/bin/doveadm
-D
>> sync -u %s -d -N -l 30 -U' %user.split(' ')[0]
>> ??????????????????????????????? print (command)
>> ??????????????????????????????? command = commands(command)
>> ??????????????????????????????? command =
command.output.split('\n')
>> ??????????????????????????????? print (command)
>> ??????????????????????????????? print ('Processed Mailbox for ...
%s'
>> %user.split(' ')[0] )
>> ??????????????????????????????? synced.append('Processed Mailbox
for ...
>> %s' %user.split(' ')[0])
>> ??????????????????????????????? for nnn in range(len(command)):
>> ??????????????????????????????????????? synced.append(command[nnn] +
'\n')
>> ??????????????????????????????? break
>>
>>
>> ??????????????????????? if options.detail == False :
>> ??????????????????????????????? #command = '/usr/local/bin/doveadm
-D
>> sync -u %s -d -N -l 30 -U' %user.split(' ')[0]
>> ??????????????????????????????? #print (command)
>> ??????????????????????????????? #command = os.system(command)
>> ??????????????????????????????? command = subprocess.Popen(
>> ["/usr/local/bin/doveadm sync -u %s -d -N -l 30 -U"
%user.split(' ')[0]
>> ], \
>> ??????????????????????????????? shell = True, stdin=None, stdout=None,
>> stderr=None, close_fds=True)
>>
>> ??????????????????????????????? print ( 'Processed Mailbox for ...
%s'
>> %user.split(' ')[0] )
>> ??????????????????????????????? synced.append('Processed Mailbox
for ...
>> %s' %user.split(' ')[0])
>> ??????????????????????????????? #sys.exit()
>> ??????????????????????????????? break
>>
>> if len(synced) != 0 :
>> ??????? #send email showing bad synced boxes ?
>>
>> ??????? if options.send_to != None :
>> ??????????????? send_from = 'monitor at scom.ca'
>> ??????????????? send_to = ['%s' %options.send_to]
>> ??????????????? send_subject = 'Dovecot Bad Sync Report for :
%s'
>> %(socket.gethostname())
>> ??????????????? send_text = '\n\n'
>> ??????????????? for n in range (len(synced)) :
>> ??????????????????????? send_text = send_text + synced[n] +
'\n'
>>
>> ??????????????? send_files = []
>> ??????????????? sendmail (send_from, send_to, send_subject, send_text,
>> send_files)
>>
>>
>>
>> sys.exit()
>>
>> second :
>>
>> i posted this a month ago - no response
>>
>> please appreciate that i am trying to help ....
>>
>> after much testing i can now reporduce the replication issues at hand
>>
>> I am running on freebsd 12 & 13 stable (both test and production
servers)
>>
>> sdram drives etc ...
>>
>> Basically replication works fine until reaching a folder quantity of ~
>> 256 or more
>>
>> to reproduce using doveadm i created folders like
>>
>> INBOX/folder-0
>> INBOX/folder-1
>> INBOX/folder-2
>> INBOX/folder-3
>> and so forth ......
>>
>> I created 200 folders and they replicated ok on both servers
>>
>> I created another 200 (400 total) and the replicator got stuck and
would
>> not update the mbox on the alternate server anymore and is still
>> updating 4 days later ?
>>
>> basically replicator goes so far and either hangs or more likely bails
>> on an error that is not reported to the debug reporting ?
>>
>> however dsync will sync the two servers but only when run manually (ie
>> all the folders will sync)
>>
>> I have two test servers avaliable if you need any kind of access -
again
>> here to help.
>>
>> [07:28:42] mail18.scom.ca [root:0] ~
>> # sync.status
>> Queued 'sync' requests??????? 0
>> Queued 'high' requests??????? 6
>> Queued 'low' requests???????? 0
>> Queued 'failed' requests????? 0
>> Queued 'full resync' requests 0
>> Waiting 'failed' requests???? 0
>> Total number of known users?? 255
>>
>> username?????????????????????? type??????? status
>> paul at scom.ca?????????????????? normal????? Waiting for dsync to
finish
>> keith at elirpa.com?????????????? incremental Waiting for dsync to
finish
>> ed.hanna at dssmgmt.com?????????? incremental Waiting for dsync to
finish
>> ed at scom.ca???????????????????? incremental Waiting for dsync to
finish
>> nick at elirpa.com??????????????? incremental Waiting for dsync to
finish
>> paul at paulkudla.net???????????? incremental Waiting for dsync to
finish
>>
>>
>> i have been going through the c code and it seems the replication gets
>> requested ok
>>
>> replicator.db does get updated ok with the replicated request for the
>> mbox in question.
>>
>> however i am still looking for the actual replicator function in the
>> lib's that do the actual replication requests
>>
>> the number of folders & subfolders is defanately the issue - not
the
>> mbox pyhsical size as thought origionally.
>>
>> if someone can point me in the right direction, it seems either the
>> replicator is not picking up on the number of folders to replicat
>> properly or it has a hard set limit like 256 / 512 / 65535 etc and
stops
>> the replication request thereafter.
>>
>> I am mainly a machine code programmer from the 80's and have
>> concentrated on python as of late, 'c' i am starting to go
through just
>> to give you a background on my talents.
>>
>> It took 2 months to finger this out.
>>
>> this issue also seems to be indirectly causing the duplicate messages
>> supression not to work as well.
>>
>> python programming to reproduce issue (loops are for last run started @
>> 200 - fyi) :
>>
>> # cat mbox.gen
>> #!/usr/local/bin/python2
>>
>> import os,sys
>>
>> from lib import *
>>
>>
>> user = 'paul at paulkudla.net'
>>
>> """
>> for count in range (0,600) :
>> ??????? box = 'INBOX/folder-%s' %count
>> ??????? print count
>> ??????? command = '/usr/local/bin/doveadm mailbox create -s -u %s
%s'
>> %(user,box)
>> ??????? print command
>> ??????? a = commands.getoutput(command)
>> ??????? print a
>> """
>>
>> for count in range (0,600) :
>> ??????? box = 'INBOX/folder-0/sub-%' %count
>> ??????? print count
>> ??????? command = '/usr/local/bin/doveadm mailbox create -s -u %s
%s'
>> %(user,box)
>> ??????? print command
>> ??????? a = commands.getoutput(command)
>> ??????? print a
>>
>>
>>
>> ??????? #sys.exit()
>>
>>
>>
>>
>>
>> Happy Sunday !!!
>> Thanks - paul
>>
>> Paul Kudla
>>
>>
>> Scom.ca Internet Services <http://www.scom.ca>
>> 004-1009 Byron Street South
>> Whitby, Ontario - Canada
>> L1N 4S3
>>
>> Toronto 416.642.7266
>> Main?1.866.411.7266
>> Fax?1.888.892.7266
>>
>> On 4/24/2022 10:22 AM, Arnaud Ab?lard wrote:
>>> Hello,
>>>
>>> I am working on replicating a server (and adding compression on the
>>> other side) and since I had "Error: dsync I/O has stalled, no
activity
>>> for 600 seconds (version not received)" errors I upgraded both
source
>>> and destination server with the latest 2.3 version (2.3.18). While
>>> before the upgrade all the 15 replication connections were busy
after
>>> upgrading dovecot replicator dsync-status shows that most of the
time
>>> nothing is being replicated at all. I can see some brief
replications
>>> that last, but 99,9% of the time nothing is happening at all.
>>>
>>> I have a replication_full_sync_interval of 12 hours but I have
>>> thousands of users with their last full sync over 90 hours ago.
>>>
>>> "doveadm replicator status" also shows that i have over
35,000 queued
>>> full resync requests, but no sync, high or low queued requests so
why
>>> aren't the full requests occuring?
>>>
>>> There are no errors in the logs.
>>>
>>> Thanks,
>>>
>>> Arnaud
>>>
>>>
>>>
>>>
>>>
>