2010/10/26 Pid <p...@pidster.com> > On 26/10/2010 13:47, Marc Wilmots wrote: > > Hi Experts, > > > > I have the following setup: > > > > Apache1 > > / \ > > Apache2 Apache3 > > \ / > > Tomcat1 > > That's an interesting setup. What does it achieve? > > Apache1 is actually part of an active/passive HA. Didn't think it was of importance to describe my problem.
> > All Apaches are version 2.2.3 (RedHat) > > Time for an upgrade methinks. > That's the Apache version that comes with RedHat 5.4. My client wants to use the Apache that comes with the RedHat 5.4 repository. If you know how to use a newer version of Apache by using the official RH repositories, please let me know. > > > Apache2 and Apache3 loadbalance Tomcat1 (6.0.18) with mod_jk (2.2.28). > > Same again for Tomcat. Presumably you mean 1.2.28 for mod_jk. > Yes, I'm sorry, I meant 1.2.28. As for the Tomcat version, this is again imposed by the client. I need very good reasons to make them update to the latest version this late in the development stadium. Do you think the problem that I have could be avoided by using a newer version? Or which bugs in 6.0.18 critically require an update? > > > In idle state the AJP connector of Tomcat1 only has 7 active connections. > > After launching a stress test of Tomcat1, it's AJP connector has reached > > maxThreads (200). After the stress test has finished, there are still 200 > > active connections in the AJP connector. > > > > Because of this, apache2 and apache2 cannot receive any heartbeat message > > anymore from the AJP connector and mark Tomcat1 as dead. I can access > > perfectly through port 8080, so Tomcat1 isn't dead at all! > > Find and enable the Executor element in server.xml, configure your > Connector to reference it. > Thanks, I'll take a look at that. > > > According to a threaddump, ALL TP-Processor-x threads are in the > following > > state: > > > > "TP-Processor41" daemon prio=10 tid=0x8ada7800 nid=0x1496 runnable > > [0x861eb000] > > java.lang.Thread.State: RUNNABLE > > at java.net.SocketInputStream.socketRead0(Native Method) > > at java.net.SocketInputStream.read(SocketInputStream.java:129) > > at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) > > at > java.io.BufferedInputStream.read1(BufferedInputStream.java:258) > > at java.io.BufferedInputStream.read(BufferedInputStream.java:317) > > - locked <0xbab3ef10> (a java.io.BufferedInputStream) > > at > org.apache.jk.common.ChannelSocket.read(ChannelSocket.java:620) > > at > > org.apache.jk.common.ChannelSocket.receive(ChannelSocket.java:558) > > at > > > org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:685) > > at > > > org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889) > > at > > > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690) > > at java.lang.Thread.run(Thread.java:619) > > > > LambaProbe confirms this and shows 200 AJP connections in KeepAlive > state. > > > > Please see my mod_jk and tomcat ajp connector configurations: > > > > server.xml: > > > > <Connector port="9009" protocol="AJP/1.3" redirectPort="8443" > > URIEncoding="UTF-8" /> > > > > workers.properties: > > > > worker.list=liferay_alf > > > > worker.alfresco1.port=9009 > > worker.alfresco1.host=10.133.23.4 > > worker.alfresco1.type=ajp13 > > worker.alfresco1.lbfactor=1 > > > > worker.liferay_alf.type=lb > > worker.liferay_alf.balance_workers=alfresco1 > > worker.liferay_alf.sticky_session=0 > > > > > > In the Tomcat documentation I've seen that the AJP connector has a > property > > keepAliveTimeout. Although, before setting this, I would like to know > from > > you guys whether this looks as apache2 and apache3 continuously keep > sending > > keepAlive messages to the open AJP connections. If so, why is this? And > do > > you think setting keepAliveTimeout in Tomcat is the best solution? > > No, nothing to do with it. See above. > > Ok, thanks again > > p >
