[ https://issues.apache.org/jira/browse/TS-3970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Leif Hedstrom updated TS-3970: ------------------------------ Fix Version/s: (was: 6.1.0) > Core in PluginVC > ---------------- > > Key: TS-3970 > URL: https://issues.apache.org/jira/browse/TS-3970 > Project: Traffic Server > Issue Type: Bug > Reporter: Susan Hinrichs > Assignee: Susan Hinrichs > Labels: crash > Attachments: ts-3970.diff > > > One of our plugins moving from 5.0.1 to 5.3.x (plus 6.0 backports) started > seeing the following stack trace with high frequency. > {code} > Program terminated with signal 11, Segmentation fault. > #0 0x000000000054c232 in PluginVC::process_read_side (this=0x2b9ace2f3850, > other_side_call=true) at PluginVC.cc:638 > in PluginVC.cc > #0 0x000000000054c232 in PluginVC::process_read_side (this=0x2b9ace2f3850, > other_side_call=true) at PluginVC.cc:638 > #1 0x000000000054be2a in PluginVC::process_write_side (this=0x2b9ace2f3a40, > other_side_call=false) at PluginVC.cc:555 > #2 0x000000000054acdb in PluginVC::main_handler (this=0x2b9ace2f3a40, > event=1, data=0x2b9b1e32e930) at PluginVC.cc:208 > #3 0x0000000000510c84 in Continuation::handleEvent (this=0x2b9ace2f3a40, > event=1, data=0x2b9b1e32e930) at ../iocore/eventsystem/I_Continuation.h:145 > #4 0x000000000079a2a6 in EThread::process_event (this=0x2b9ab63d9010, > e=0x2b9b1e32e930, calling_code=1) at UnixEThread.cc:128 > #5 0x000000000079a474 in EThread::execute (this=0x2b9ab63d9010) at > UnixEThread.cc:179 > #6 0x0000000000799851 in spawn_thread_internal (a=0x2fea360) at Thread.cc:85 > #7 0x00002b9ab457e9d1 in start_thread () from /lib64/libpthread.so.0 > #8 0x00000030d38e88fd in clone () from /lib64/libc.so.6 > {code} > The output buffer fetched by PluginVC::process_read_side was NULL. > I think they reason this appears in 5.3 is due to the fix for TS-3522. > Before that change only one do_io_read was made very early to set up the read > from server. This bug fix delays the real read to later and pulls mbuf out > of server_buffer_reader. In some cases for this plugin, the mbuf is NULL by > the time we get there. > I fixed the core by using server_session->read_buffer in the do_io_read > instead of server_buffer_reader->mbuf. This seems to fix the problem. -- This message was sent by Atlassian JIRA (v6.3.4#6332)