View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0003683 | GNUnet | transport service | public | 2015-02-12 20:57 | 2018-06-07 00:25 |
| Reporter | Christian Grothoff | Assigned To | Christian Grothoff | ||
| Priority | immediate | Severity | block | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Platform | i7 | OS | Debian GNU/Linux | OS Version | squeeze |
| Product Version | Git master | ||||
| Target Version | 0.11.0pre66 | Fixed in Version | 0.11.0pre66 | ||
| Summary | 0003683: peers fail to respond to PING | ||||
| Description | When a peer runs "for some time" (hours?), it at some point stops responding to (certain?) PING requests. This was confirmed with 'gnunet9' not responding to PINGs from my own system. Note that my own system was configured to ONLY use TCP. My current suspicion is that there might be a connection counting issue, which might have caused gnunet.org to stop accepting incoming TCP connections (GNUNET_SERVER_suspend) and thus never see the PINGs (and if the PING is not received, it won't be answered either). I've added # TCP service suspended|resumed stats to track such events. However, the cause could be different, but still the fact that peers end up disconnected would be totally explained by long-running peers no longer responding to PINGs. | ||||
| Tags | No tags attached. | ||||
| related to | 0003687 | closed | Christian Grothoff | WARNING `accept' failed at connection.c:345 with error: Resource temporarily unavailable |
| child of | 0003448 | closed | Christian Grothoff | Core-level (transport? ats?) connectivity problems |
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These stats (from gnunet9) shows that really the suspend/resume of the TCP service is to blame: transport # bytes transmitted via TCP: 1447426911 transport # bytes currently in TCP buffers: 0 transport # bytes received via TCP: 5389990419 transport # TCP sessions active: 1 transport # TCP service suspended: 166 transport # TCP WELCOME messages received: 502 transport # bytes discarded by TCP (disconnect): 773865 transport # network-level TCP disconnect events: 1971 transport # TCP service resumed: 165 transport # bytes discarded by TCP (timeout): 11860 |
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Fixed the counting logic (significant simplification) in SVN 35283. This should fix this issue. |
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Suspending still seems to happen. But see also 0003687. |
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Maybe resolved together with 0003687 now, but should keep observing a bit longer. |
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I still see TCP service suspended-events (and > resumed). Very odd. |
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We still sometimes (briefly) suspend the TCP server, but that's because we really hit the 128-connection limit. But in this case, we do resume now. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2015-02-12 20:57 | Christian Grothoff | New Issue | |
| 2015-02-12 20:57 | Christian Grothoff | Status | new => assigned |
| 2015-02-12 20:57 | Christian Grothoff | Assigned To | => Matthias Wachs |
| 2015-02-12 20:58 | Christian Grothoff | Relationship added | child of 0003448 |
| 2015-02-12 21:16 | Christian Grothoff | Summary | peers fail to respond to PONG => peers fail to respond to PING |
| 2015-02-12 21:16 | Christian Grothoff | Description Updated | |
| 2015-02-18 00:34 | Christian Grothoff | Note Added: 0008886 | |
| 2015-02-18 15:08 | Christian Grothoff | Note Added: 0008890 | |
| 2015-02-18 15:08 | Christian Grothoff | Status | assigned => resolved |
| 2015-02-18 15:08 | Christian Grothoff | Fixed in Version | => 0.11.0pre66 |
| 2015-02-18 15:08 | Christian Grothoff | Resolution | open => fixed |
| 2015-02-18 15:08 | Christian Grothoff | Assigned To | Matthias Wachs => Christian Grothoff |
| 2015-02-19 14:18 | Christian Grothoff | Note Added: 0008897 | |
| 2015-02-19 14:18 | Christian Grothoff | Status | resolved => feedback |
| 2015-02-19 14:18 | Christian Grothoff | Resolution | fixed => reopened |
| 2015-02-19 14:19 | Christian Grothoff | Relationship added | related to 0003687 |
| 2015-02-21 22:52 | Christian Grothoff | Note Added: 0008909 | |
| 2015-02-21 22:52 | Christian Grothoff | Status | feedback => assigned |
| 2015-02-28 14:41 | Christian Grothoff | Note Added: 0008932 | |
| 2015-02-28 18:26 | Christian Grothoff | Note Added: 0008942 | |
| 2015-02-28 18:26 | Christian Grothoff | Status | assigned => resolved |
| 2015-02-28 18:26 | Christian Grothoff | Resolution | reopened => fixed |
| 2018-06-07 00:25 | Christian Grothoff | Status | resolved => closed |
