Yes, they all seem to be waiting on the same lock. Here's a snippet of one
of those threads:
"qtp1870207216-62" prio=10 tid=0x00007fa36030f800 nid=0x791c waiting for
monitor entry [0x00007fa34a6e9000]
java.lang.Thread.State: BLOCKED (on object monitor)
at
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:568)
- waiting to lock <0x0000000780398e50> (a
org.eclipse.jetty.servlet.ServletHolder)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1367)
at
org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:212)
at
org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:179)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1338)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)
On Wed, Dec 19, 2012 at 12:23 PM, Simone Bordet <[email protected]> wrote:
> Hi,
>
> On Wed, Dec 19, 2012 at 3:46 PM, Jeff Segal <[email protected]>
> wrote:
> > I am load testing a Cometd app deployed to Jetty 8.1.3.v20120416. What I
> > find occasionally, but not always, is that the handshake process is
> > extremely slow (~15-20s per client instead of 100ms).
> >
> > Looking at a thread dump, I see that the vast majority of QTP threads in
> the
> > following state:
> >
> > "qtp1870207216-70" prio=10 tid=0x00007fa35419b800 nid=0x7924 waiting for
> > monitor entry [0x00007fa349fe2000]
> > java.lang.Thread.State: BLOCKED (on object monitor)
> > at
> > org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:568)
> > - waiting to lock <0x0000000780398e50> (a
> > org.eclipse.jetty.servlet.ServletHolder)
>
> From the stack trace dump, you should find a stack trace that says
> something like:
>
> "locked <0x0000000780398e50>"
>
> What is that thread doing ?
>
> All threads are blocked waiting for the same lock ?
>
> Simon
> --
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> ----
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> the implementation technique must be flawless. Victoria Livschitz
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