interesting, Did you turn cache_config_ram_cache_compress on ?
On Wed, 2012-06-20 at 07:58 +0000, Hua Cai (JIRA) wrote:
> [
> https://issues.apache.org/jira/browse/TS-1310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13397340#comment-13397340
> ]
>
> Hua Cai commented on TS-1310:
> -----------------------------
>
> Well, do_read_call() will call handleRead() which may set handler as
> handleReadDone while return EVENT_RETURN.
> The "goto Lread" logic in removeEvent() makes it possible that do_read_call()
> is called when the handler of cache vc points to handleReadDone which will
> then be stored in save_handler.
>
>
> > crash due to infinite loop
> > ---------------------------
> >
> > Key: TS-1310
> > URL: https://issues.apache.org/jira/browse/TS-1310
> > Project: Traffic Server
> > Issue Type: Bug
> > Components: Cache
> > Affects Versions: 3.1.3
> > Reporter: Hua Cai
> >
> > #10035 CacheVC::handleReadDone (this=0xd125690, event=<value optimized
> > out>, e=<value optimized out>) at Cache.cc:1946
> > #10036 0x000000000064106c in handleEvent (this=0xd125690, event=<value
> > optimized out>, e=<value optimized out>)
> > at ../../iocore/eventsystem/I_Continuation.h:146
> > #10037 CacheVC::handleReadDone (this=0xd125690, event=<value optimized
> > out>, e=<value optimized out>) at Cache.cc:1946
> > #10038 0x000000000064106c in handleEvent (this=0xd125690, event=<value
> > optimized out>, e=<value optimized out>)
> > at ../../iocore/eventsystem/I_Continuation.h:146
> > #10039 CacheVC::handleReadDone (this=0xd125690, event=<value optimized
> > out>, e=<value optimized out>) at Cache.cc:1946
> > #10040 0x000000000064106c in handleEvent (this=0xd125690, event=<value
> > optimized out>, e=<value optimized out>)
> > at ../../iocore/eventsystem/I_Continuation.h:146
> > #10041 CacheVC::handleReadDone (this=0xd125690, event=<value optimized
> > out>, e=<value optimized out>) at Cache.cc:1946
> > #10042 0x000000000064106c in handleEvent (this=0xd125690, event=<value
> > optimized out>, e=<value optimized out>)
> > at ../../iocore/eventsystem/I_Continuation.h:146
> > #10043 CacheVC::handleReadDone (this=0xd125690, event=<value optimized
> > out>, e=<value optimized out>) at Cache.cc:1946
> > #10044 0x000000000064106c in handleEvent (this=0xd125690, event=<value
> > optimized out>, e=<value optimized out>)
> > at ../../iocore/eventsystem/I_Continuation.h:146
> > #10045 CacheVC::handleReadDone (this=0xd125690, event=<value optimized
> > out>, e=<value optimized out>) at Cache.cc:1946
> > #10046 0x0000000000648c46 in handleEvent (this=0x0, event=<value optimized
> > out>, data=<value optimized out>)
> > at ../../iocore/eventsystem/I_Continuation.h:146
> > #10047 AIOCallbackInternal::io_complete (this=0x0, event=<value optimized
> > out>, data=<value optimized out>) at ../../iocore/aio/P_AIO.h:80
> > #10048 0x00000000006c503f in EThread::process_event (this=0x2aaaaf281010,
> > e=0x2aaae409e5c0, calling_code=1) at I_Continuation.h:146
> > #10049 0x00000000006c553a in EThread::execute (this=0x2aaaaf281010) at
> > UnixEThread.cc:189
> > #10050 0x00000000006c437e in spawn_thread_internal (a=0x90402b0) at
> > Thread.cc:88
> > #10051 0x00002ab0029b473d in start_thread () from /lib64/libpthread.so.0
> > #10052 0x00002ab004b130cd in clone () from /lib64/libc.so.6
> > possible reason:
> > In case of collision CacheVC::removeEvent() called do_read_call(). Handler
> > of cache vc was set to handleReadDone() by handleRead(). If handleRead()
> > also returned EVENT_RETURN, CacheVC:removeEvent() jumped to label Lread. If
> > collision was detected again, do_read_call() may be called once more. In
> > this situation, handleReadDone was saved in save_handler. At the end of
> > handleReadDone, POP_HANDLER finally led to infinite loop since save_handler
> > pointed to handleReadDone.
>
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