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

[Ernst de Haan]

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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