When I run Tomcat 5.5 with APR the min/maxSpareThread attributes
don't appear to be working. maxThreads works fine however. Here's
the details:
Versions:
Tomcat 5.5.16
APR 1.2.6
Native Connector 1.1.2
Sun's JDK 1.5.0_06
RedHat AS3
With APR:
server.xml:
<Connector port="4443" maxHttpHeaderSize="8192"
address="10.0.111.47"
maxThreads="50" minSpareThreads="15"
maxSpareThreads="25"
enableLookups="false" disableUploadTimeout="true"
acceptCount="100" scheme="https" secure="true"
SSLEngine="on"
SSLCertificateFile="${catalina.base}/conf/x4j2ee.crt"
SSLCertificateKeyFile="${catalina.base}/conf/
x4j2ee.key" />
catalina.out:
Apr 18, 2006 10:19:16 AM org.apache.coyote.http11.Http11AprProtocol
start
INFO: Starting Coyote HTTP/1.1 on http-10.0.111.47-4443
/manager/status:
http-10.0.111.47-4443
Max threads: 50 Min spare threads: 0 Max spare threads: 0 Current
thread count: 1 Current thread busy: 1 Keeped alive sockets count: 0
I also verified that this wasn't just a problem with the manager
app's reporting. Doing a thread dump (kill -3) on the PID showed
only 3 threads associated with the http-10.0.111.47-4443 connector (a
Poller, an Acceptor and a "-1" thread). I can also change the
maxThreads value and that update is reflected in the manager's status
page.
Without APR:
server.xml:
<Connector port="4443" maxHttpHeaderSize="8192"
address="10.0.111.47"
maxThreads="50" minSpareThreads="15"
maxSpareThreads="25"
enableLookups="false" disableUploadTimeout="true"
acceptCount="100" scheme="https" secure="true"
sslProtocol="TLS" />
catalina.out:
Apr 18, 2006 10:14:17 AM org.apache.coyote.http11.Http11BaseProtocol
start
INFO: Starting Coyote HTTP/1.1 on http-10.0.111.47-4443
/manager/status:
http-10.0.111.47-4443
Max threads: 50 Min spare threads: 15 Max spare threads: 25 Current
thread count: 15 Current thread busy: 1
Again, I verified with a thread dump that without APR enabled I see
threads "http-10.0.111.47-4443-Processor1" to "http-10.0.111.47-4443-
Processor15".
Known bug? Configuration problem I missed?
The example shown at http://tomcat.apache.org/tomcat-5.5-doc/apr.html
includes the min/maxSpareThreads attributes.
Thanks,
-adam
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