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https://issues.apache.org/jira/browse/PROTON-826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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michael goulish resolved PROTON-826.
------------------------------------
Resolution: Fixed
I recreated my test from February, and cannot reproduce the bug using latest
dispatch + protron code.
> recent checkin causes frequent double-free or corruption crash
> --------------------------------------------------------------
>
> Key: PROTON-826
> URL: https://issues.apache.org/jira/browse/PROTON-826
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: 0.9
> Reporter: michael goulish
> Assignee: michael goulish
> Priority: Blocker
>
> In my dispatch testing I am seeing frequent crashes in proton library that
> began with proton checkin 01cb00c on 2015-02-15 "report read and write
> errors through the transport"
> The output at crash-time says this:
> ---------------------------------------------------
> *** Error in `/home/mick/dispatch/install/sbin/qdrouterd': double free or
> corruption (fasttop): 0x00000000020ee880 ***
> ======= Backtrace: =========
> /lib64/libc.so.6[0x3e3d875a4f]
> /lib64/libc.so.6[0x3e3d87cd78]
> /lib64/libqpid-proton.so.2(pn_error_clear+0x18)[0x7f4f4f4e1f18]
> /lib64/libqpid-proton.so.2(pn_error_set+0x11)[0x7f4f4f4e1f41]
> /lib64/libqpid-proton.so.2(pn_error_vformat+0x3e)[0x7f4f4f4e1f9e]
> /lib64/libqpid-proton.so.2(pn_error_format+0x82)[0x7f4f4f4e2032]
> /lib64/libqpid-proton.so.2(pn_i_error_from_errno+0x67)[0x7f4f4f4fd737]
> /lib64/libqpid-proton.so.2(pn_recv+0x5a)[0x7f4f4f4fd16a]
> /home/mick/dispatch/install/lib64/libqpid-dispatch.so.0(qdpn_connector_process+0xd7)[0x7f4f4f759430]
> The backtrace from the core file looks like this:
> ------------------------------------------------------------
> #0 0x0000003e3d835877 in raise () from /lib64/libc.so.6
> #1 0x0000003e3d836f68 in abort () from /lib64/libc.so.6
> #2 0x0000003e3d875a54 in __libc_message () from /lib64/libc.so.6
> #3 0x0000003e3d87cd78 in _int_free () from /lib64/libc.so.6
> #4 0x00007fbf8a59b2e8 in pn_error_clear (error=error@entry=0x1501140)
> at /home/mick/rh-qpid-proton/proton-c/src/error.c:56
> #5 0x00007fbf8a59b311 in pn_error_set (error=error@entry=0x1501140,
> code=code@entry=-2,
> text=text@entry=0x7fbf801a69c0 "recv: Resource temporarily unavailable")
> at /home/mick/rh-qpid-proton/proton-c/src/error.c:65
> #6 0x00007fbf8a59b36e in pn_error_vformat (error=0x1501140, code=-2,
> fmt=<optimized out>,
> ap=ap@entry=0x7fbf801a6de8) at
> /home/mick/rh-qpid-proton/proton-c/src/error.c:81
> #7 0x00007fbf8a59b402 in pn_error_format (error=error@entry=0x1501140,
> code=<optimized out>,
> fmt=fmt@entry=0x7fbf8a5bb21e "%s: %s") at
> /home/mick/rh-qpid-proton/proton-c/src/error.c:89
> #8 0x00007fbf8a5b6797 in pn_i_error_from_errno (error=0x1501140,
> msg=msg@entry=0x7fbf8a5bbe1a "recv")
> at /home/mick/rh-qpid-proton/proton-c/src/platform.c:119
> #9 0x00007fbf8a5b61ca in pn_recv (io=0x14e77b0, socket=<optimized out>,
> buf=<optimized out>,
> size=<optimized out>) at
> /home/mick/rh-qpid-proton/proton-c/src/posix/io.c:271
> #10 0x00007fbf8a812430 in qdpn_connector_process (c=0x7fbf7801c7f0)
> ---------------------------------------------------------
> And I can prevent the crash from happening, apparently forever, by commenting
> out this line:
> free(error->text);
> in the function pn_error_clear
> in the file proton-c/src/error.c
> The error text that is being freed which causes the crash looks like this:
> $2 = {text = 0x7f66e8104e30 "recv: Resource temporarily unavailable", root
> = 0x0, code = -2}
> My dispatch test creates a router network and then repeatedly kills and
> restarts a randomly-selected router. After this proton checkin it almost
> never gets through 5 iterations without this crash. After I commented out
> that line, it got through more than 500 iterations before I stopped it.
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