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Posted to dev@directmemory.apache.org by "Min Zhou (JIRA)" <ji...@apache.org> on 2012/09/29 09:00:07 UTC
[jira] [Updated] (DIRECTMEMORY-101) JVM never exit even the main
thread finished
[ https://issues.apache.org/jira/browse/DIRECTMEMORY-101?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Min Zhou updated DIRECTMEMORY-101:
----------------------------------
Attachment: DIRECTMEMORY-101.diff
After jstack the process, I found that there was a non-daemon thread still running. The timer was released by CacheServiceImpl.java.
Fixing this issue is quite easy, simply turn the code to construct a daemon timer.
DIRECTMEMORY-101.diff is the patch for this issue.
> JVM never exit even the main thread finished
> --------------------------------------------
>
> Key: DIRECTMEMORY-101
> URL: https://issues.apache.org/jira/browse/DIRECTMEMORY-101
> Project: Apache DirectMemory
> Issue Type: Bug
> Components: core
> Affects Versions: 0.2
> Reporter: Min Zhou
> Attachments: DIRECTMEMORY-101.diff
>
>
> I wrote some microbenchmark code , which just simply put 10 millions of <key,value> in to directorymemory. and found that JVM never exit even the main thread finished running.
> {noformat}
> public class Benchmark
> {
>
> private static long ITER = 1000000000L;
> public static double testHeap()
> {
> CacheService<Long, String> cacheService = new DirectMemory<Long, String>()
> .setNumberOfBuffers( 100 )
> .setSize( 10000 )
> .setInitialCapacity( 100000 )
> .setConcurrencyLevel( 1 )
> .setSerializer( new MessagePackSerializer() )
> .newCacheService();
>
> final String str = "helloworld";
> // warm up
> for(long l = 0; l < ITER; l++) {
> cacheService.put(l, str);
> }
> cacheService.clear();
> long start = System.currentTimeMillis();
> for(long l = 0; l < ITER; l++) {
> cacheService.put(l, str);
> }
> return ((double) ITER / (System.currentTimeMillis() - start )) * 1000;
> }
>
> public static void main( String[] args )
> {
> ITER = Long.parseLong( args[0] );
> System.gc();
> System.out.println("testHeap: ops=" + testHeap());
> }
> }
> {noformat}
--
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Re: [jira] [Updated] (DIRECTMEMORY-101) JVM never exit even the main
thread finished
Posted by "Raffaele P. Guidi" <ra...@gmail.com>.
thanks, I'll try to check it out ASAP
Ciao,
R
On Sat, Sep 29, 2012 at 9:00 AM, Min Zhou (JIRA) <ji...@apache.org> wrote:
>
> [
> https://issues.apache.org/jira/browse/DIRECTMEMORY-101?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel]
>
> Min Zhou updated DIRECTMEMORY-101:
> ----------------------------------
>
> Attachment: DIRECTMEMORY-101.diff
>
> After jstack the process, I found that there was a non-daemon thread still
> running. The timer was released by CacheServiceImpl.java.
> Fixing this issue is quite easy, simply turn the code to construct a
> daemon timer.
>
> DIRECTMEMORY-101.diff is the patch for this issue.
>
> > JVM never exit even the main thread finished
> > --------------------------------------------
> >
> > Key: DIRECTMEMORY-101
> > URL:
> https://issues.apache.org/jira/browse/DIRECTMEMORY-101
> > Project: Apache DirectMemory
> > Issue Type: Bug
> > Components: core
> > Affects Versions: 0.2
> > Reporter: Min Zhou
> > Attachments: DIRECTMEMORY-101.diff
> >
> >
> > I wrote some microbenchmark code , which just simply put 10 millions of
> <key,value> in to directorymemory. and found that JVM never exit even the
> main thread finished running.
> > {noformat}
> > public class Benchmark
> > {
> >
> > private static long ITER = 1000000000L;
> > public static double testHeap()
> > {
> > CacheService<Long, String> cacheService = new DirectMemory<Long,
> String>()
> > .setNumberOfBuffers( 100 )
> > .setSize( 10000 )
> > .setInitialCapacity( 100000 )
> > .setConcurrencyLevel( 1 )
> > .setSerializer( new MessagePackSerializer() )
> > .newCacheService();
> >
> > final String str = "helloworld";
> > // warm up
> > for(long l = 0; l < ITER; l++) {
> > cacheService.put(l, str);
> > }
> > cacheService.clear();
> > long start = System.currentTimeMillis();
> > for(long l = 0; l < ITER; l++) {
> > cacheService.put(l, str);
> > }
> > return ((double) ITER / (System.currentTimeMillis() - start ))
> * 1000;
> > }
> >
> > public static void main( String[] args )
> > {
> > ITER = Long.parseLong( args[0] );
> > System.gc();
> > System.out.println("testHeap: ops=" + testHeap());
> > }
> > }
> > {noformat}
>
> --
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