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Re: [jetty-users] (fixed)5 minute pause with jetty...is this a JVM issue(anyone else seen this?)
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It was the jdk1.6.0_25...switching to 1.6.0_05 fixed that issue....sweet. Dang JVM to JVM has buggy socket stuff, especially nio though I turned off nio to eliminate that I thought.
yes, I had done lots of thread dumps and all looked normal(except that two thread dumps 6 seconds apart were exactly the same).
JVM must have an internal timeout of 5 minutes in the native code or something before it releases....I did see one nio thread even though I was using bio...maybe it was JMX or something.
thanks,
Dean
On Wed, Sep 21, 2011 at 2:57 PM, Pavel Jbanov
<pavel.jbanov@xxxxxxxxx> wrote:
Did you look at the thread dump while it's hanging? I once found in one of my setups that InetAddress.getLocalHost() was hanging because of local DNS related issues. VisualVM is a great tool for debugging things like this.
Pavel
I am using jetty-distribution-7.4.5.v20110725 with jdk 1.6.0_26
I run 10 servers, start them all up and at least one sometimes two will encounter a 5 minute pause. I see the request come in on ethereal and have a filter that logs every request(first thing it does) and that request is logged 5 minutes after I see it in wireshark. I cannot telnet into the frozen server port 8080 BUT when another port is open like 8081, I can telnet into 8081 during this weird pause. I am wondering if it is an underlying lock in the JVM. There is no deadlocks according to jstack -m nor jstack -l command and all threads look find....all of them are stuck on read from socket for like 5 minutes exactly.
I see there is a tcp timeout of 5 minutes in the tcp spec for something. I see no 5 minute timeouts for jetty. Anyone know any valid JVM configuration timeout values I could tweak and see if the pause period changes length at all?
thanks,
Dean
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