Hi everybody, Recently my Asterisk server started to behave strangely: in some cases (hard to diagnose and reproduce), the SIP module stops responding, and the log is filled with messages "Failed to grab lock, trying again..." (about a hundred messages or so per second). This often happens at the end of a SIP call (right after "== Spawn extension (SipExtension, 029156044, 1) exited non-zero on 'SIP/7001-717b'" for instance). Sometimes the message is logged a few times, then the SIP modules stays alive, at other times it seems to go into a loop and writes the message endlessly to the log (I have to kill the process to make it stop). Any idea? Thank you, Silviu