Am Friday 27 May 2016 schrieb Timo Sirainen <[email protected]> >On 05 May 2016, at 16:21, Marc Joliet <[email protected]> wrote: [...] >> Rebooting the system would make it go away (without loss of mails), though >> remounting the file system should have worked, too. I tried a variety of >> options, but the only one that helped was to convert the mailbox from mdbox >> to maildir. I have not seen any pread() failures in the two weeks since. >I can't really think of why Maildir format would get rid of the problem, >since the dovecot.index.log files still exist and they're accessed the same >way. Maybe with Maildir there are enough locks that it prevents some race >condition that triggers this.
Yeah, I was somewhat surprised even without knowing that. And what do you know: two days ago I discovered pread() failures in my system log again, but this time they went away by themselves without me noticing that they even occurred: Mai 23 18:03:45 diefledermaus dovecot[600]: imap(marcec): Error: pread() failed with file /home/marcec/.maildir/.LinuxAudio.Dev/dovecot.index.log: Input/output error Mai 23 18:03:45 diefledermaus dovecot[600]: imap(marcec): Error: pread() failed with file /home/marcec/.maildir/.LinuxAudio.Dev/dovecot.index.log: Input/output error Mai 23 18:13:57 diefledermaus dovecot[600]: imap(marcec): Error: pread() failed with file /home/marcec/.maildir/.LinuxAudio.Dev/dovecot.index.log: Input/output error Mai 23 18:13:57 diefledermaus dovecot[600]: imap(marcec): Error: pread() failed with file /home/marcec/.maildir/.LinuxAudio.Dev/dovecot.index.log: Input/output error There were also a whole bunch affecting the same file on May 20th, but not before. I probably didn't notice those because they started shortly before I rebooted for a kernel upgrade (from gentoo-sources 4.4.10 to 4.5.5). >You could try stress testing with imaptest to see if it's easy to reproduce: >http://imapwiki.org/ImapTest I still haven't had time to do this, but haven't forgotten! Greetings -- Marc Joliet -- "People who think they know everything really annoy those of us who know we don't" - Bjarne Stroustrup
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