Re: [tcljava-dev] TclBlend Core Dump

[Mo D. <md...@un...>]

On Wed, 25 Aug 2004 14:06:25 -0700 (PDT)
Bruce Chidester <bru...@ya...> wrote:

> 
> Thank you for your response and willingness to help.
> 
> I have this problem in a very small box. 
> 
> Behavior:
> 
> When making a Tcl "package" and a command extension using an outside SNMP implementation, the command causes a core dump. The same implementation in JACL works fine. I reduced the problem to a few dependencies in the Java made package. They are:

Here is the crash I got when I tried your example:

Exception in thread "main" java.lang.NoClassDefFoundError: snmp/SNMPsample
JavaCmdProc : unexpected pending exception
SIGABRT 6 (*) abort process
        stackpointer=0xbfffe48c

Full thread dump Classic VM (J2RE 1.3.0 IBM build cxdev-20000502, native threads):
    "Finalizer" (TID:0x40408708, sys_thread_t:0x829a9d0, state:CW, native ID:0x1005) prio=8


The problem in this example is that the class should be defined in a dir named snmp
not in the same dir. I assume you built with "javac *.java" and it put the class files
in the current dir.

You can work around the crash like so:

% javac -d tmp PTLCommands.java SayhelloCmd.java SNMPsample.java
% find tmp
tmp
tmp/PTLCommands.class
tmp/SayhelloCmd.class
tmp/snmp
tmp/snmp/SNMPsample.class

Then change the a.tcl file to:

java::load -classpath tmp PTLCommands

That should avoid the crash, getting the code to not crash in the first place
is another issue, one that I will have to look into more.

cheers
Mo