[ 
https://issues.apache.org/jira/browse/NETBEANS-2999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16909854#comment-16909854
 ] 

Shevek commented on NETBEANS-2999:
----------------------------------


"Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00007f203c092800 nid=0x189c 
runnable [0x00007f2015357000]
   java.lang.Thread.State: RUNNABLE
        at java.util.Arrays$ArrayList.indexOf(Arrays.java:3860)
        at java.util.Arrays$ArrayList.contains(Arrays.java:3868)
        at java.util.IdentityHashMap$KeySet.removeAll(IdentityHashMap.java:999)
        at org.openide.util.lookup.ProxyLookup.setData(ProxyLookup.java:283)
        at 
org.openide.util.lookup.ProxyLookup.unregisterTemplate(ProxyLookup.java:249)
        - locked <0x00000007254c1ee0> (a 
org.netbeans.spi.project.support.DelegatingLookupImpl)
        at org.openide.util.lookup.ProxyLookup.access$400(ProxyLookup.java:50)
        at org.openide.util.lookup.ProxyLookup$WeakRef.run(ProxyLookup.java:727)
        at org.openide.util.lookup.ProxyLookup$R.finalize(ProxyLookup.java:345)
        at java.lang.System$2.invokeFinalize(System.java:1270)
        at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:102)
        at java.lang.ref.Finalizer.access$100(Finalizer.java:34)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:217)



> NetBeans has consumed entire heap with WeakListenerImpl$ListenerReference
> -------------------------------------------------------------------------
>
>                 Key: NETBEANS-2999
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-2999
>             Project: NetBeans
>          Issue Type: Bug
>    Affects Versions: 11.1
>            Reporter: Shevek
>            Priority: Major
>         Attachments: netbeans-all-listener-references.png
>
>
> See image.  A random sampling suggests that they're all calling 
> FileChangeListener.
> Randomly sampling: ListenerReference.weakListener.source is a FolderObj on 
> /tmp, or a pointer into .cache/netbeans/11.1index



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