Looks like just idle threads, not really a problem
If you want the thread pool to shrink and stop idle threads, use an
<Executor> element in server.xml
Filip
On 04/13/2010 08:50 AM, Jeffrey Janner wrote:
Before someone asks for it:
<Connector address="172.16.27.1" port="443" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="5" maxSpareThreads="75"
enableLookups="false" acceptCount="100"
connectionTimeout="20000" disableUploadTimeout="true"
compression="on"
compressableMimeType="text/html,text/xml,text/plain,text/css,text/csv,te
xt/javascript,text/rtf,text/richtext"
scheme="https" secure="true" clientAuth="false"
SSLEngine="on"
SSLCertificateFile="path_to_server.crt"
SSLCertificateKeyFile=" path_to_server.key"
SSLCertificateChainFile="path_to_server_chain.crt"
SSLPassword="changeit" />
-----Original Message-----
From: Jeffrey Janner [mailto:jeffrey.jan...@polydyne.com]
Sent: Tuesday, April 13, 2010 9:44 AM
To: Tomcat Users List
Subject: Hung threads
I had a connector go from minimal connections (restart) to all threads
hung overnight.
The current thread dump shows the threads as follows:
"http-172.16.27.1-443-150" daemon prio=6 tid=0x66793800 nid=0xe43c in
Object.wait() [0x7063f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x1a924f00> (a
org.apache.tomcat.util.net.AprEndpoint$Worker)
at java.lang.Object.wait(Object.java:485)
at
org.apache.tomcat.util.net.AprEndpoint$Worker.await(AprEndpoint.java:125
5)
- locked<0x1a924f00> (a
org.apache.tomcat.util.net.AprEndpoint$Worker)
at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1280)
at java.lang.Thread.run(Thread.java:619)
"http-172.16.27.1-443-149" daemon prio=6 tid=0x6496d400 nid=0xe400 in
Object.wait() [0x705ff000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x1a954140> (a
org.apache.tomcat.util.net.AprEndpoint$Worker)
at java.lang.Object.wait(Object.java:485)
at
org.apache.tomcat.util.net.AprEndpoint$Worker.await(AprEndpoint.java:125
5)
- locked<0x1a954140> (a
org.apache.tomcat.util.net.AprEndpoint$Worker)
at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1280)
at java.lang.Thread.run(Thread.java:619)
"http-172.16.27.1-443-148" daemon prio=6 tid=0x6496f400 nid=0xe3b0 in
Object.wait() [0x705bf000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on<0x1a8655f0> (a
org.apache.tomcat.util.net.AprEndpoint$Worker)
at java.lang.Object.wait(Object.java:485)
at
org.apache.tomcat.util.net.AprEndpoint$Worker.await(AprEndpoint.java:125
5)
- locked<0x1a8655f0> (a
org.apache.tomcat.util.net.AprEndpoint$Worker)
at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1280)
at java.lang.Thread.run(Thread.java:619)
and so on. Other connectors are running OK, though some also show
threads in the same state. All other threads look normal. This has one
customer's app hung, but others in the Tomcat instance are working just
fine. Any help on where to start looking here?
Server Details: Windows 2000 SP4, Sun JDK 1.6.0_18, Tomcat 5.5.17,
native libs 1.1.18.
Waiting for TC 5.5.29 before upgrading due to bugs with APR/SSL in
5.5.28.
Jeff
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