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Posted to dev@tomcat.apache.org by bu...@apache.org on 2016/02/16 19:49:42 UTC
[Bug 59015] New: Endless loop in APR poller during connector
shutdown
https://bz.apache.org/bugzilla/show_bug.cgi?id=59015
Bug ID: 59015
Summary: Endless loop in APR poller during connector shutdown
Product: Tomcat 8
Version: trunk
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Connectors
Assignee: dev@tomcat.apache.org
Reporter: rainer.jung@kippdata.de
While running the TC 8 test suite and endless loop int he APR poller occured
during the test org.apache.catalina.core.TestStandardWrapper. The situation
might be a race condition that is not related to the specific test.
Code was TC 8 HEAD plus APR 1.2.4 based on OpenSSL 1.0.2f and APR 1.5.2.
Platform Sun Solaris 10 Sparc. The machine was pretty busy, when the problem
occured.
Error message occuring before the loop starts (only one such message):
[junit] 16-Feb-2016 17:30:31.285 SEVERE [http-apr-127.0.0.1-auto-6-Poller]
org.apache.tomcat.util.net.AprEndpoint$Poller.run Poller failed with error [9]
: [Bad file number]
Relevant stacks:
main seems to hang in
[junit] "main" prio=3 tid=0x0002a400 nid=0x2 runnable [0xfdf7d000]
[junit] java.lang.Thread.State: RUNNABLE
[junit] at org.apache.tomcat.jni.Pool.destroy(Native Method)
[junit] at
org.apache.tomcat.util.net.AprEndpoint$Sendfile.destroy(AprEndpoint.java:2147)
[junit] at
org.apache.tomcat.util.net.AprEndpoint.stopInternal(AprEndpoint.java:781)
[junit] at
org.apache.tomcat.util.net.AbstractEndpoint.stop(AbstractEndpoint.java:814)
[junit] at
org.apache.coyote.AbstractProtocol.stop(AbstractProtocol.java:517)
[junit] at
org.apache.catalina.connector.Connector.stopInternal(Connector.java:1011)
[junit] at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:224)
[junit] - locked <0xe6337060> (a
org.apache.catalina.connector.Connector)
[junit] at
org.apache.catalina.core.StandardService.stopInternal(StandardService.java:517)
[junit] - locked <0xe633eb28> (a java.lang.Object)
[junit] at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:224)
[junit] - locked <0xe633ea58> (a
org.apache.catalina.core.StandardService)
[junit] at
org.apache.catalina.core.StandardServer.stopInternal(StandardServer.java:790)
[junit] at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:224)
[junit] - locked <0xe633e2c8> (a
org.apache.catalina.core.StandardServer)
[junit] at org.apache.catalina.startup.Tomcat.stop(Tomcat.java:355)
[junit] at
org.apache.catalina.startup.TomcatBaseTest.tearDown(TomcatBaseTest.java:218)
Poller seems to loop, whenever I look it is in:
[junit] "http-apr-127.0.0.1-auto-6-Poller" daemon prio=3 tid=0x004fbc00
nid=0x4d runnable [0xb2aff000]
[junit] java.lang.Thread.State: RUNNABLE
[junit] at org.apache.tomcat.jni.Poll.create(Native Method)
[junit] at
org.apache.tomcat.util.net.AprEndpoint.allocatePoller(AprEndpoint.java:881)
[junit] at
org.apache.tomcat.util.net.AprEndpoint$Poller.run(AprEndpoint.java:1988)
[junit] at java.lang.Thread.run(Thread.java:745)
[junit]
Regards,
Rainer
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[Bug 59015] Endless loop in APR poller during connector shutdown
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59015
--- Comment #2 from Mark Thomas <ma...@apache.org> ---
It looks like the Poller thread enters the if (reset) { ... block during
shutdown. That looks like it could create all sorts of chaos. Fixing that
should be fairly easy.
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[Bug 59015] Endless loop in APR poller during connector shutdown
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59015
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Mark Thomas <ma...@apache.org> ---
OK. Fixed in 9.0.x (for 9.0.0.M4 onwards), 8.0.x (for 8.0.33 onwards) and 7.0.x
(for 7.0.69 onwards).
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[Bug 59015] Endless loop in APR poller during connector shutdown
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=59015
Rainer Jung <ra...@kippdata.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
OS| |All
--- Comment #1 from Rainer Jung <ra...@kippdata.de> ---
Additional info:
- truss does not show any system call activity.
- unfortunately I forgot to use pstack to get info about the native frames
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