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From Craig.Condit <Craig.Con...@target.com>
Subject Re: Admin server deadlocks?
Date Tue, 21 Jan 2020 14:49:34 GMT
I don’t have stack traces handy, but was able to eliminate the problem in our environment
by updating Jetty to 9.4.24 (ZOOKEEPER-3638 backport).

Craig

From: "Chris T." <c.turksema@gmail.com>
Reply-To: "user@zookeeper.apache.org" <user@zookeeper.apache.org>
Date: Tuesday, January 21, 2020 at 5:09 AM
To: "user@zookeeper.apache.org" <user@zookeeper.apache.org>
Subject: Re: Admin server deadlocks?

Yes, attached.

On Tue, Jan 21, 2020 at 6:19 AM Enrico Olivelli <eolivelli@gmail.com<mailto:eolivelli@gmail.com>>
wrote:
Do you have a dump of the stack traces if the JVM during the problem?


Enrico

Il lun 20 gen 2020, 21:06 Cee Tee <c.turksema@gmail.com<mailto:c.turksema@gmail.com>>
ha scritto:

> Hey that sounds familiar, we do curl to the stats api and they pretty
> consistently start to hang after a while (minutes to hours).
> I thought it was something in our environment but I'm happy to read I'm
> not
> the only one. :)
> I used to run a snapshot 3.6 that didn't suffer from this. It appeared
> after 'upgrading' to the official 356.
> Regards
> Chris
>
> On 20 January 2020 20:54:51 Craig.Condit <Craig.Condit@target.com<mailto:Craig.Condit@target.com>>
wrote:
>
> > We have been running Zookeeper 3.5.6 on several clusters for a while
> now,
> > and have noticed (pretty consistently) that the new Admin Server seems
> to
> > stop responding (hangs) after the ZK service has been up and running for
> a
> > while. The stack dumps we have done seem to indicate some sort of lock
> > being held, probably by Jetty. This makes sense, as when we see the hang
> > start, it happens for all URLs (even the root / 404 not found page).
> >
> >
> > Has anyone encountered this? I was not able to find a related JIRA.
>
>
>
>
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