Unexpected signal: 11 [Was: Sun JDK 1.4.2_01 for Linux]

[Ernst de Haan]

Okay okay okay. Attachments are a nightmare with this list. Get the file 
here:

http://people.freebsd.org/~znerd/SynchronizeOnNull.java

Ernst

On maandag 15 september 2003 12:42, Ernst de Haan wrote:
> The problem is the following code snippet:
>
>    synchronized (session) {
>
>    }
>
> where session is null. I've written a small program to attempt to
> reproduce the problem with that, but now the result is different. See the
> attached .java file. Still the native JDK 1.4 handles it correctly,
> producing a NullPointerException, but the Sun JDK 1.4.2_01 for Linux just
> hangs.
>
> Should we send this to -hackers for investigation?
>
> Ernst
>
> On vrijdag 12 september 2003 17:11, Ernst de Haan wrote:
> > Okay. It's reproducible. If I start Tomcat, running my web service
> > application (WAR), I execute CreateSession and then GetSessionDetails
> > for that session and BOOM
> >
> > With the native jdk14, I just get a NullPointerException...
> >
> > Ernst
> >
> > On vrijdag 12 september 2003 16:54, Ernst de Haan wrote:
> > > > Is it just my imagination or is the Sun JDK 1.4.2_01 for Linux
> > > > (java/linux-sun-jdk14) stable and very well performing? On my
> > > > FreeBSD
> > >
> > > It was just my imagination ;-) See below for the error message I got
> > > seconds after I started up my application server and executed no more
> > > than 3 requests:
> > >
> > >
> > > Unexpected Signal : 11 occurred at PC=0x2A6BD991
> > > Function=[Unknown.]
> > > Library=(N/A)
> > >
> > > NOTE: We are unable to locate the function name symbol for the error
> > >       just occurred. Please refer to release documentation for
> > > possible reason and solutions.
> > >
> > >
> > > Current Java thread:
> > >
> > > Dynamic libraries:
> > > Can not get information for pid = 21338
> > >
> > > Heap at VM Abort:
> > > Heap
> > >  def new generation   total 576K, used 138K [0x2c760000, 0x2c800000,
> > > 0x2cc40000)
> > >   eden space 512K,  24% used [0x2c760000, 0x2c77ee30, 0x2c7e0000)
> > >   from space 64K,  23% used [0x2c7e0000, 0x2c7e3b78, 0x2c7f0000)
> > >   to   space 64K,   0% used [0x2c7f0000, 0x2c7f0000, 0x2c800000)
> > >  tenured generation   total 3036K, used 2298K [0x2cc40000,
> > > 0x2cf37000, 0x30760000)
> > >    the space 3036K,  75% used [0x2cc40000, 0x2ce7e870, 0x2ce7ea00,
> > > 0x2cf37000)
> > >  compacting perm gen  total 5376K, used 5140K [0x30760000,
> > > 0x30ca0000, 0x34760000)
> > >    the space 5376K,  95% used [0x30760000, 0x30c653f8, 0x30c65400,
> > > 0x30ca0000)
> > >
> > > Local Time = Fri Sep 12 16:50:59 2003
> > > Elapsed Time = 194
> > > #
> > > # HotSpot Virtual Machine Error : 11
> > > # Error ID : 4F530E43505002EF
> > > # Please report this error at
> > > # http://java.sun.com/cgi-bin/bugreport.cgi
> > > #
> > > # Java VM: Java HotSpot(TM) Client VM (1.4.2_01-b06 mixed mode)
> > > #
> > > # An error report file has been saved as hs_err_pid21314.log.
> > > # Please refer to the file for further information.
> > >
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