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| 18:15.48 | blast007 | fun, got a bzfs instance that keeps going into an infinite loop... |
| 18:17.53 | blast007 | not sure if I'm using gdb right, but it *looks* like it's getting stuck in a send loop |
| 18:18.30 | JeffM | is it a huge buffered packet? |
| 18:18.30 | khonkhortisan | you can track packets with wireshark |
| 18:19.02 | blast007 | wireshark kinda needs a GUI, no? :) |
| 18:19.05 | blast007 | tcpdump, maybe |
| 18:19.18 | blast007 | but I don't know what exactly to filter on, and this isn't the only thing running |
| 18:20.33 | JeffM | or start at the bzfs side and see how much data is trying to be sent, do you think it's blocked in send or calling send a bunch of times? |
| 18:20.47 | blast007 | the send has a length of 288 |
| 18:21.01 | blast007 | 844* (not sure how I typoed it that badly...) |
| 18:21.16 | JeffM | was that part of a large buffered message that bzfs broke up? |
| 18:21.19 | blast007 | think it was 208 the other day though |
| 18:21.34 | blast007 | not sure - how would I check that? |
| 18:23.01 | blast007 | maybe we're not handling SIGPIPE? |
| 18:23.31 | blast007 | http://static.bzexcess.com/loop.txt |
| 18:24.54 | JeffM | log a message in sendBufferedNetDataForPeer |
| 18:25.07 | JeffM | to see what kind of message sizes are there |
| 18:25.21 | JeffM | that function takes a big packet and breaks it up into muliple sends IIRC |
| 18:25.40 | JeffM | so maybe it's not doing that correctly |
| 18:25.44 | JeffM | or using too big of a chunk |
| 18:26.02 | blast007 | well, is there anything I can do live from the server? it's running yet and I have it attached in gdb |
| 18:26.45 | blast007 | 'print peer.netHandler->getTargetIP()' shows an IP that wasn't on the server.. |
| 18:26.46 | JeffM | probbly not |
| 18:27.06 | JeffM | well you could set a conditional breakpoint |
| 18:27.10 | blast007 | or at least, wasn't in the logDetail output |
| 18:27.13 | JeffM | is it currently in the infinate loop? |
| 18:27.24 | blast007 | yeah |
| 18:27.47 | JeffM | if you set a breakpoint in send and then step up does it go back to buffered send? |
| 18:29.57 | blast007 | <PROTECTED> |
| 18:30.07 | blast007 | this is causing the infinite loop because it's never emptying out |
| 18:30.33 | blast007 | bz_disconnectNonPlayerConnection inside bzfsAPI.cxx I think |
| 18:30.33 | JeffM | yeah that's what my fear was |
| 18:30.59 | JeffM | so the player disconnected in the middle of a big bufferd send then? |
| 18:31.00 | blast007 | and I think it can't empty out because the connection was terminated already |
| 18:31.08 | blast007 | that's my guess |
| 18:31.08 | JeffM | yeah we should check that |
| 18:33.18 | blast007 | // don't die on broken pipe |
| 18:33.20 | blast007 | bzSignal(SIGPIPE, SIG_IGN); |
| 18:33.28 | blast007 | is that an issue? :) |
| 18:33.42 | JeffM | not really |
| 18:33.55 | JeffM | the pipe can fix itself, that's what TCP does |
| 18:34.04 | JeffM | but we should be able to detect the disconnection state |
| 18:34.09 | blast007 | k |
| 18:36.28 | blast007 | if it's a non-player connection, that means it's an HTTP plugin? |
| 18:36.51 | JeffM | I think sendBufferedNetDataForPeer needs to return true or false based on if it was able to send a chunk, and then we can skip the flush if they disco |
| 18:38.14 | blast007 | I'll see if I can forcefully duplicate the issue when I get home and then see about a fix |
| 18:39.15 | blast007 | if it's just triggered by pulling the map from fastmap, it should be easy to write some little script |
| 18:44.17 | blast007 | the map it's pulling is 63KB compressed while my other server is only 4KB compressed |
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