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Posted to dev@tomcat.apache.org by bu...@apache.org on 2014/03/25 20:07:06 UTC
[Bug 56313] New: Tomcat 8 crashes in tcnative-1.dll+0x7923
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
Bug ID: 56313
Summary: Tomcat 8 crashes in tcnative-1.dll+0x7923
Product: Tomcat Native
Version: 1.1.29
Hardware: PC
Status: NEW
Severity: major
Priority: P2
Component: Library
Assignee: dev@tomcat.apache.org
Reporter: ti_mo_n@poczta.fm
Created attachment 31435
--> https://issues.apache.org/bugzilla/attachment.cgi?id=31435&action=edit
the log from the crash
Tomcat 8 crashed when ~1000 users were browsing a website (JSP front-end,
Struts-2 backend with Java Persistence API, Hibernate, c3p0, MySQL).
No crashes are observed when using JAVA NIO (not tested with JAVA BIO).
The attached file is from the crash.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #9 from Christopher Schultz <ch...@christopherschultz.net> ---
Could you provide a JMeter test case? I'm sure that would be helpful. I'm not
win32 dev, but I'm sure something that can reproduce the issue would be helpful
to whoever looks at this.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #7 from Timcesq <ti...@poczta.fm> ---
Apaprently - yes. I wasn't able to reproduce it with low number of concurrent
users. But it's hard to say if it would never crash or it's just that it would
crash -- only much later.
I used JMeter to simulate high load.
The whole server works flawlessly (including very low request-response latency)
until the very end when it crashes. Nothing exceptional happens in the system:
no unusual disk activity, no other CPU- or RAM-hungry processes. It just
crashes suddenly for no obvious reason.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
ti_mo_n@poczta.fm changed:
What |Removed |Added
----------------------------------------------------------------------------
OS| |All
--- Comment #2 from ti_mo_n@poczta.fm ---
APR version is 1.5. OpenSSL 1.0.1f.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #8 from Timcesq <ti...@poczta.fm> ---
With 4000 users, it crashes in less than a minute (Used JMeter to test).
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #10 from Timcesq <ti...@poczta.fm> ---
Created attachment 31441
--> https://issues.apache.org/bugzilla/attachment.cgi?id=31441&action=edit
JMeter test plan
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
Timcesq <ti...@poczta.fm> changed:
What |Removed |Added
----------------------------------------------------------------------------
OS|All |Windows 8
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #5 from ti_mo_n@poczta.fm ---
8.0.3 - currently the latest one, AFAIK.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #3 from ti_mo_n@poczta.fm ---
Created attachment 31437
--> https://issues.apache.org/bugzilla/attachment.cgi?id=31437&action=edit
third one - same issue. Just to show that this is a recurring thing.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #13 from Timcesq <ti...@poczta.fm> ---
A quick workaround would be to check for NULL before doing the read. However,
if the library is designed so that there shouldn't be any NULLs at this point
in the code, such patch would only mask the underlying bug (a race condition
maybe?).
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #4 from Konstantin Kolinko <kn...@gmail.com> ---
> Tomcat 8 crashed
What exactly version of Tomcat 8.0.x ?
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #12 from Timcesq <ti...@poczta.fm> ---
What I meant is that the s->pe is NULL, so a read from that address crashes the
application.
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #6 from Christopher Schultz <ch...@christopherschultz.net> ---
Does high-load appear to be a required factor?
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
ti_mo_n@poczta.fm changed:
What |Removed |Added
----------------------------------------------------------------------------
OS| |Windows 8
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
Timcesq <ti...@poczta.fm> changed:
What |Removed |Added
----------------------------------------------------------------------------
OS| |All
--- Comment #11 from Timcesq <ti...@poczta.fm> ---
I used a debugger to locate the crash address in the source code. It looks like
the crash occurs inside the function "Java_org_apache_tomcat_jni_Poll_poll",
specifically inside the following block:
for (i = 0; i < num; i++) {
tcn_socket_t *s = (tcn_socket_t *)fd->client_data;
p->set[i*2+0] = (jlong)(fd->rtnevents);
p->set[i*2+1] = P2J(s);
if (remove) {
apr_pollset_remove(p->pollset, fd);
APR_RING_REMOVE(s->pe, link);
APR_RING_INSERT_TAIL(&p->dead_ring, s->pe, tcn_pfde_t, link);
s->pe = NULL;
p->nelts--;
#ifdef TCN_DO_STATISTICS
p->sp_removed++;
#endif
}
else {
/* Update last active with the current time
* after the poll call.
*/
s->last_active = now;
}
fd ++;
}
The crash address suggests that a read of the "s->pe" variable inside the
"if(remove)" block fails (the variable is null).
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[Bug 56313] Tomcat 8 crashes in tcnative-1.dll+0x7923
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=56313
--- Comment #1 from ti_mo_n@poczta.fm ---
Created attachment 31436
--> https://issues.apache.org/bugzilla/attachment.cgi?id=31436&action=edit
another log - same issue
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