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.j...@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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