Bernd Wurst writes:
What I saw was this: Many (this time, there have been about 1000) imapd processes with no parent process (except for init). Looking via strace, these processes are waiting for FAM.# strace -f -p 32523 Process 32523 attached - interrupt to quitconnect(6, {sa_family=AF_FILE, path=@"/tmp/fam-goodschool-"}, I don't know what exactly this means. Named files of this form don't exist in /tmp.Any clue?
What is the usual parent process of imapd? I suspect that this is an SSL connection, so the parent process is couriertls.
It looks like you have a FAM issue on your server. Your FAM server crashes. FAM clients then hang waiting to connect to the FAM server, the client gives up waiting and disconnects, couriertls sees that the client connection is closed, terminates the connection, and exits. Since couriertcpd's child process has terminated, couriertcpd counts the connection is closed, meanwhile the imapd process is hanging forever.
You need to find out why your FAM server is crashing.
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