Re: FW: [Quickfix-developers] QF 1.6 JVM crashes on connect/logon.

[Alex H. <al...@an...>]

Yes, the Linux JVMs really don't like it when start() creates a thread 
from C++.

Using blockingStart() avoids this - if you want the equivalent of the 
start() behavoir you can always create a thread in java then call 
blockingStart() in it.

Perhaps the java start() implementations should not call the C++ 
start(), and instead be implemented in terms of creating a Java thread 
from java, then calling blockingStart()? - that way we avoid the "java 
thread created from C++" problem.

Cheers,
Alex.

Verma, Sanjay wrote:

> While the apparent problem was not exactly the same as Arif's problem, 
> I guess the root cause was the same. Thanks for pointing me to it 
> Asad. I replaced start() with blockingStart() and the JVM stopped 
> crashing.
>
> -----Original Message-----
> *From:* Verma, Sanjay
> *Sent:* Monday, October 20, 2003 6:36 PM
> *To:* 'qui...@li...'
> *Subject:* FW: [Quickfix-developers] QF 1.6 JVM crashes on connect/logon.
>
> I managed to attach gdb to the running JVM and tried debugging the C++ 
> source code. The JVM crash is not always in the same place or at the 
> same execution sequence. Sometimes it crashes in ~Acceptor though I 
> have also seen it crash in ~SessionID. Also, sometimes it crashes as 
> soon as the logon message is received whereas other times it chashes 
> after responding to the first heartbeat message!
>  
> I am using JDK 1.4.2 on RedHat Linux 8. QuickFix version, as I 
> mentioned, is 1.6
>  
> It I am attaching the captured output here. Hopefully it is not too 
> much! Any help would be welcome.
>  
> Thanks.
>  
>  
> -----Original Message-----
> *From:* Verma, Sanjay
> *Sent:* Monday, October 20, 2003 3:20 PM
> *To:* qui...@li...
> *Subject:* [Quickfix-developers] QF 1.6 JVM crashes on connect/logon.
>
> I am using version 1.6. I have a thread in a program that accepts 
> connections. As soon as the tradeclient (example) connects and sends a 
> login message, the JVM crashes. The output is not particularly 
> helpful. This happens repeatedly. No other debugging info is 
> available. I cannot seem to use either jdb or strace to get any further.
>
> 1. Has anyone else run into this?
> 2. How do you debug when you have problem such as this? What debugger 
> or what means of getting more info?
>
> Thanks.
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