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Hello Alex,</div>
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sorry for not responding sooner.</div>
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>From my experience, the most common reasons behind this error messages are:</div>
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1) Syslog-ng do not have the proper permissions to read /dev/log</div>
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2) /dev/log is already opened by an another process. (Maybe Syslog-ng started multiple times.)</div>
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If the problem still exists, please share the details of your platform and I will try to reproduce your problem with the attached configuration.</div>
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Best regards,
<div>Laszlo</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Alexandre Santos <alexandre.rosas.santos@gmail.com><br>
<b>Sent:</b> Thursday, August 12, 2021 15:40<br>
<b>To:</b> Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu><br>
<b>Subject:</b> [syslog-ng] Resource temporarily unavailable while reading from system.journal</font>
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<span style="color:#9C6500; font-weight:bold">CAUTION:</span> This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.</div>
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<div>Hi,</div>
<br>
<div>I am seeing the following strace log when running the syslog-ng 3.32 with the configuration in the attachment:</div>
<div><span style="font-family:monospace">root@myhost:/home/shared# sudo strace -f -yyy -s 256 -e trace=read -p 2539<br>
strace: Process 2539 attached with 4 threads<br>
[pid 2539] read(48<anon_inode:[timerfd]>, "\1\0\0\0\0\0\0\0", 8) = 8<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
[pid 2539] read(11<anon_inode:inotify>, "\2\0\0\0\2\0\0\0\0\0\0\0\20\0\0\0system.journal\0\0", 272) = 32<br>
[pid 2539] read(11<anon_inode:inotify>, 0x7ffda019f930, 272) = -1 EAGAIN (Resource temporarily unavailable)<br>
^Cstrace: Process 2539 detached<br>
strace: Process 11623 detached<br>
strace: Process 20518 detached<br>
strace: Process 22517 detached</span></div>
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<div><span style="font-family:monospace"><span style="font-family:arial,sans-serif">This normal behaviour?</span><br>
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<div><span style="font-family:arial,sans-serif">Thanks & Regards,</span></div>
<div><span style="font-family:monospace"><span style="font-family:arial,sans-serif">Alex</span><br>
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