Hey,
I'm running into the same thing on a Linux workstation. It's a virtual
instance, so I'm not sure if that might have something to do with it, but
it's definitely strange.
Here's one exception that I see:
[junit] Exception in thread "pool-1-thread-1"
java.lang.RuntimeException: Unable to read from byte cache
[junit] at
com.google.gwt.dev.util.DiskCache.transferToStream(DiskCache.java:201)
[junit] at
com.google.gwt.dev.util.DiskCacheToken.writeObject(DiskCacheToken.java:91)
[junit] at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[junit] at java.lang.reflect.Method.invoke(Method.java:616)
[junit] at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:962)
[junit] at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1480)
[junit] at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
[junit] at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
[junit] at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
[junit] at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)
[junit] at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
[junit] at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
[junit] at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
[junit] at java.util.ArrayList.writeObject(ArrayList.java:673)
[junit] at sun.reflect.GeneratedMethodAccessor33.invoke(Unknown Source)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[junit] at java.lang.reflect.Method.invoke(Method.java:616)
[junit] at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:962)
[junit] at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1480)
[junit] at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
[junit] at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
[junit] at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
[junit] at
com.google.gwt.dev.javac.CachedCompilationUnit.writeObject(CachedCompilationUnit.java:223)
[junit] at sun.reflect.GeneratedMethodAccessor65.invoke(Unknown Source)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[junit] at java.lang.reflect.Method.invoke(Method.java:616)
[junit] at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:962)
[junit] at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1480)
[junit] at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
[junit] at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
[junit] at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
[junit] at
com.google.gwt.dev.javac.PersistentUnitCache$6.run(PersistentUnitCache.java:446)
[junit] at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
[junit] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
[junit] at java.lang.Thread.run(Thread.java:679)
[junit] Caused by: java.io.EOFException
[junit] at java.io.RandomAccessFile.readInt(RandomAccessFile.java:776)
[junit] at
com.google.gwt.dev.util.DiskCache.transferToStream(DiskCache.java:188)
[junit] ... 35 more
Which suggests that we're attempting to read data from the cache before
we've added anything..
and then tons of the form:
[junit] Exception in thread "pool-1-thread-3" java.lang.NullPointerException
[junit] at
com.google.gwt.dev.util.DiskCache.transferToStream(DiskCache.java:187)
[junit] at
com.google.gwt.dev.util.DiskCacheToken.writeObject(DiskCacheToken.java:91)
[junit] at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[junit] at java.lang.reflect.Method.invoke(Method.java:616)
[junit] at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:962)
[junit] at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1480)
[junit] at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
[junit] at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
[junit] at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
[junit] at
java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:438)
[junit] at
com.google.gwt.dev.javac.CachedCompilationUnit.writeObject(CachedCompilationUnit.java:222)
[junit] at sun.reflect.GeneratedMethodAccessor65.invoke(Unknown Source)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[junit] at java.lang.reflect.Method.invoke(Method.java:616)
[junit] at
java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:962)
[junit] at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1480)
[junit] at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
[junit] at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
[junit] at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
[junit] at
com.google.gwt.dev.javac.PersistentUnitCache$6.run(PersistentUnitCache.java:446)
[junit] at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
[junit] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
[junit] at java.lang.Thread.run(Thread.java:679)
The only way this could happen is if the file object is null (line 187) -
but that can only really happen if close() is called. It can't be called by
another class directly, as it's private, so it must be invoked via the
finalizer - but that should only happen on JVM shutdown.
Perhaps the finalizer gets run, but there are a ton of threads that were
scheduled to write data at that time?
I don't know this area of code well enough to really know what's going on
here..
On Wed, Jun 13, 2012 at 11:31 AM, Stephen Haberman <
stephen.haber...@gmail.com> wrote:
> >
> > [junit] Exception in thread "pool-1-thread-569"
> > > java.lang.NullPointerException [junit] at
> > >
> com.google.gwt.dev.util.DiskCache.transferToStream(DiskCache.java:187)
> > > [junit] at
> > >
> > >
> com.google.gwt.dev.util.DiskCacheToken.writeObject(DiskCacheToken.java:91)
> > >
> >
> > At the very least, that suggests there is a bug in the DiskCache code
> > that lets an NPE leak out. Do you have enough disk space?
>
> Sorry for not replying sooner; I have ~25gb free now (down from 50gb
> free a few days ago, but I had to install some IE VMs; crap they're
> huge).
>
> I would not be surprised if something terribly degenerate happened; I
> have swap turned off on my machine, so whenever my ~12gb of RAM is
> gone (which it was in this case), things start failing in really odd
> ways. Chrome tabs crash, applications go wonky, etc.
>
> I might poke at it a bit more but am probably not going to worry too
> much about it.
>
> - Stephen
>
> --
> http://groups.google.com/group/Google-Web-Toolkit-Contributors
>
--
http://groups.google.com/group/Google-Web-Toolkit-Contributors
