[Neo4j] EmbeddedGraphDatabase shutdown leaves a Timer thread running
I think I have the Getting Started example working, but after it creates the nodes and shuts down, my JVM won't exit because there is a non-daemon Timer thread running. I have an example class with a main() that is copied near-verbatim from http://wiki.neo4j.org/content/Getting_Started_Guide except for the db path and a few extra System.outs. Everything seems to work normally, but after shutting down the EmbeddedGraphDatabase the JVM will not exit. A jstack shows a running java.util.TimerThread, which I assume is started by the database. Its stack is: --- "Timer-0" prio=10 tid=0x7f59c0056800 nid=0xa29 in Object.wait() [0x7f59bf6d5000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x7f5a1ed37270> (a java.util.TaskQueue) at java.util.TimerThread.mainLoop(Timer.java:509) - locked <0x7f5a1ed37270> (a java.util.TaskQueue) at java.util.TimerThread.run(Timer.java:462) --- I'm using the neo4j maven dependency: org.neo4j.neo4j, version=1.2.M01, type=pom. When I changed this to neo4j-kernel, version=1.0 the JVM exited as expected (no code change on my end). Does anyone have any idea why this is happening? Adam ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] EmbeddedGraphDatabase shutdown leaves a Timer thread running
On Wed, Oct 13, 2010 at 4:11 PM, Adam Lehenbauer wrote: > I think I have the Getting Started example working, but after it creates the > nodes and shuts down, my JVM won't exit because there is a non-daemon Timer > thread running. > > I have an example class with a main() that is copied near-verbatim from > http://wiki.neo4j.org/content/Getting_Started_Guide except for the db path > and a few extra System.outs. > > Everything seems to work normally, but after shutting down > the EmbeddedGraphDatabase the JVM will not exit. A jstack shows a running > java.util.TimerThread, which I assume is started by the database. > > Its stack is: > > --- > "Timer-0" prio=10 tid=0x7f59c0056800 nid=0xa29 in Object.wait() > [0x7f59bf6d5000] > java.lang.Thread.State: TIMED_WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x7f5a1ed37270> (a java.util.TaskQueue) > at java.util.TimerThread.mainLoop(Timer.java:509) > - locked <0x7f5a1ed37270> (a java.util.TaskQueue) > at java.util.TimerThread.run(Timer.java:462) > --- > > I'm using the neo4j maven dependency: org.neo4j.neo4j, version=1.2.M01, > type=pom. When I changed this to neo4j-kernel, version=1.0 the JVM exited as > expected (no code change on my end). > > Does anyone have any idea why this is happening? > > Adam Hi there, Could you run it with a configuration setting of "cache_type"="soft" and inform on the result? Also, describe a bit your environment (CPU, OS, JVM) cheers, CG ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] EmbeddedGraphDatabase shutdown leaves a Timer thread running
This is an identified problem and it will be fixed soon, available in the next milestone as well as snapshot builds. Until then System.exit( 0 ) is your friend. 2010/10/13 Adam Lehenbauer > I think I have the Getting Started example working, but after it creates > the > nodes and shuts down, my JVM won't exit because there is a non-daemon Timer > thread running. > > I have an example class with a main() that is copied near-verbatim from > http://wiki.neo4j.org/content/Getting_Started_Guide except for the db path > and a few extra System.outs. > > Everything seems to work normally, but after shutting down > the EmbeddedGraphDatabase the JVM will not exit. A jstack shows a running > java.util.TimerThread, which I assume is started by the database. > > Its stack is: > > --- > "Timer-0" prio=10 tid=0x7f59c0056800 nid=0xa29 in Object.wait() > [0x7f59bf6d5000] > java.lang.Thread.State: TIMED_WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > - waiting on <0x7f5a1ed37270> (a java.util.TaskQueue) > at java.util.TimerThread.mainLoop(Timer.java:509) > - locked <0x7f5a1ed37270> (a java.util.TaskQueue) > at java.util.TimerThread.run(Timer.java:462) > --- > > I'm using the neo4j maven dependency: org.neo4j.neo4j, version=1.2.M01, > type=pom. When I changed this to neo4j-kernel, version=1.0 the JVM exited > as > expected (no code change on my end). > > Does anyone have any idea why this is happening? > > Adam > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] EmbeddedGraphDatabase shutdown leaves a Timer thread running
I added:
Map map = new HashMap();
map.put("cache_type", "soft");
and gave the map to the EmbeddedGraphDatabase constructor; no change in
behavior.
I'm running:
Java HotSpot, 1.6.0_18
64 bit
Ubuntu 10.04 (lucid)
I've got 4 AMD Phenom cores.
On Wed, Oct 13, 2010 at 9:34 AM, Chris Gioran wrote:
> On Wed, Oct 13, 2010 at 4:11 PM, Adam Lehenbauer
> wrote:
> > I think I have the Getting Started example working, but after it creates
> the
> > nodes and shuts down, my JVM won't exit because there is a non-daemon
> Timer
> > thread running.
> >
> > I have an example class with a main() that is copied near-verbatim from
> > http://wiki.neo4j.org/content/Getting_Started_Guide except for the db
> path
> > and a few extra System.outs.
> >
> > Everything seems to work normally, but after shutting down
> > the EmbeddedGraphDatabase the JVM will not exit. A jstack shows a running
> > java.util.TimerThread, which I assume is started by the database.
> >
> > Its stack is:
> >
> > ---
> > "Timer-0" prio=10 tid=0x7f59c0056800 nid=0xa29 in Object.wait()
> > [0x7f59bf6d5000]
> > java.lang.Thread.State: TIMED_WAITING (on object monitor)
> > at java.lang.Object.wait(Native Method)
> > - waiting on <0x7f5a1ed37270> (a java.util.TaskQueue)
> > at java.util.TimerThread.mainLoop(Timer.java:509)
> > - locked <0x7f5a1ed37270> (a java.util.TaskQueue)
> > at java.util.TimerThread.run(Timer.java:462)
> > ---
> >
> > I'm using the neo4j maven dependency: org.neo4j.neo4j, version=1.2.M01,
> > type=pom. When I changed this to neo4j-kernel, version=1.0 the JVM exited
> as
> > expected (no code change on my end).
> >
> > Does anyone have any idea why this is happening?
> >
> > Adam
>
> Hi there,
>
> Could you run it with a configuration setting of "cache_type"="soft"
> and inform on the result?
> Also, describe a bit your environment (CPU, OS, JVM)
>
> cheers,
> CG
> ___
> Neo4j mailing list
> User@lists.neo4j.org
> https://lists.neo4j.org/mailman/listinfo/user
>
___
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