Georg Hajdu

After a bit of experimenting I came to the conclusion that 

net.tcp.send is not very robust under the following circumstances:

When trying to send tcp packets to a client located behind a 

firewall, I experience crashes of thread 0 with no further details in 

the crash report. The problem seemed to be caused or aggravated by my 

NAT router sending these packets to the wrong computer. (As soon as I 

change to the right settings the crashes seem to go away.) On 

occasion I was able to spot a bunch of error messages in the Max 

window right before Max quits (really just a short glimpse). These 

error messages seem to refer to Java exceptions. Unfortunately, I 

can't be more specific, but I suspect that it has something to do 

with the fact that packets couldn't be delivered. Interestingly, this 

problem also arose after an instance of the mxj net.tcp.send object 

was destroyed, which makes me wonder whether there's an issue with 

the communication between Java and Max. What about messages being 

sent by the Java Virtual Engine to Max objects that to don't exist 

any longer? Does Max have a provision for something like this?

I hope this doesn't sound too dilettante, as I'm really not very 

familiar with the things that happen under the "hood." I just hope 

that something could be done about the crashes.

After a bit of experimenting I came to the conclusion that  
net.tcp.send is not very robust under the following circumstances:
When trying to send tcp packets to a client located behind a  
firewall, I experience crashes of thread 0 with no further details in  
the crash report. The problem seemed to be caused or aggravated by my  
NAT router sending these packets to the wrong computer. (As soon as I  
change to the right settings the crashes seem to go away.) On  
occasion I was able to spot a bunch of error messages in the Max  
window right before Max quits (really just a short glimpse). These  
error messages seem to refer to Java exceptions. Unfortunately, I  
can't be more specific, but I suspect that it has something to do  
with the fact that packets couldn't be delivered. Interestingly, this  
problem also arose after an instance of the mxj net.tcp.send object  
was destroyed, which makes me wonder whether there's an issue with  
the communication between Java and Max. What about messages being  
sent by the Java Virtual Engine to Max objects that to don't exist  
any longer? Does Max have a provision for something like this?

I hope this doesn't sound too dilettante, as I'm really not very  
familiar with the things that happen under the "hood." I just hope  
that something could be done about the crashes.

net-tcp-send-is-not-robust

I've gone over the code and I can't see anything wrong with net.tcp.*

. I wrote an evil test class as a sanity-check to see if a thread

that perpetually calls an outlet call would kill Max if you delete the

object without being careful. mxj did not crash. I don't think I can

help you out without an example patch that reproducibly crashes.

I've gone over the code and I can't see anything wrong with net.tcp.*
.  I wrote an evil test class as a sanity-check to see if a thread
that perpetually calls an outlet call would kill Max if you delete the
object without being careful.  mxj did not crash.  I don't think I can
help you out without an example patch that reproducibly crashes.

I'm not surprised that this problem is difficult to track. I'll try 

to create a patch which will simulate the conditions under which I 

experience the crashes. This also implies connecting to my network 

which can be reached at georghajdu.dyndns.org. More soon...

I'm not surprised that this problem is difficult to track. I'll try  
to create a patch which will simulate the conditions under which I  
experience the crashes. This also implies connecting to my network  
which can be reached at georghajdu.dyndns.org. More soon...

This what I found in the console's log file (so it seems that Java is 

STILL NOT FOUND*** PATH: Server HD RAID Set 1:/Library/Application 

Support/Cycling '74/Apr 25 00:14:16 XServe servermgrd: servermgr_dns: 

no name available via DNS for 193.175.148.231

Apr 25 00:14:16 XServe servermgrd: servermgr_dns: no hostname set and 

unable to detect via DNS, services may not function properly - use 

MaxMSP qdport_enforce: location=max_eventtimerproc(2), port=48e8420, 

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: An 

unexpected Java error has been detected by HotSpot Virtual Machine:

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: / 

Users/himem/Library/Logs/Java/JavaNativeCrash_pid9721.crash. log

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: If 

this error is reproducible, please report it with the following 

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: 1. 

Provide the steps to reproduce, a test case, and any relevant 

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: 2. 

The corresponding JavaNativeCrash_pid.crash.log (Java state)

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: 3. 

The corresponding .crash.log (native state; generated by 

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: File 

Apr 25 00:22:50 XServe crashdump[9800]: MaxMSP 4.5.app crashed

Apr 25 00:22:52 XServe crashdump[9800]: crash report written to: / 

Users/himem/Library/Logs/CrashReporter/MaxMSP 4.5.app.crash.log

and this is the JavaNativeCrash_pid9721.crash.log:

# This JavaNativeCrash log describes the Java state at a Native Crash 

# The corresponding native state can be found in the crash log 

# If this error is reproducible, please report it with the following 

# 1. Provide the steps to reproduce, a test case, and any relevant 

# 2. This JavaNativeCrash_pid.crash.log (Java state)

# 3. The corresponding .crash.log (native state; generated by 

An unexpected exception has been detected in native code outside the VM.

Unexpected Signal : Bus Error occurred at PC=0x35207374

NOTE: We are unable to locate the function name symbol for the error

just occurred. Please refer to release documentation for possible

Cannot find the last Java frame, printing stack disabled.

[0x000019e0-0x000027f8] /System/Library/Frameworks/Carbon.framework/ 

[0x908dbe74-0x908dbf44] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/CoreServices

[0x92ef4e68-0x92ef4f38] /System/Library/Frameworks/Carbon.framework/ 

[0x8fa79d60-0x8fc8e920] /System/Library/Frameworks/ 

[0x90000f60-0x9019638c] /usr/lib/libSystem.B.dylib

[0x90213e80-0x902165d8] /usr/lib/system/libmathCommon.A.dylib

[0x90b87040-0x90c66bd4] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/Frameworks/CarbonCore.fram ework/ 

[0x907b9eec-0x90869afc] /System/Library/Frameworks/ 

CoreFoundation.framework/Versions/A/CoreFoundation

[0x90ec4a18-0x90f23a2c] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/Frameworks/OSServices.fram ework/ 

[0x90f8de8c-0x90fc8710] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/Frameworks/CFNetwork.frame work/ 

[0x90fe4030-0x90ff7d5c] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/Frameworks/ 

WebServicesCore.framework/Versions/A/WebServicesCore

[0x9100c11c-0x9106f0bc] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/Frameworks/SearchKit.frame work/ 

[0x910d2ca0-0x910f2564] /System/Library/Frameworks/ 

CoreServices.framework/Versions/A/Frameworks/Metadata.framew ork/ 

[0x90ae7c90-0x90b45a48] /System/Library/Frameworks/IOKit.framework/ 

[0x908de680-0x909ce508] /usr/lib/libicucore.A.dylib

[0x9110c954-0x91116ad0] /usr/lib/libz.1.dylib

[0x9111da70-0x91241948] /System/Library/Frameworks/Security.framework/ 

[0x913d0dc8-0x913d8a48] /System/Library/Frameworks/ 

DiskArbitration.framework/Versions/A/DiskArbitration

[0x913e06a0-0x91402158] /System/Library/Frameworks/ 

SystemConfiguration.framework/Versions/A/SystemConfiguration

[0x9141b314-0x91425254] /usr/lib/libgcc_s.1.dylib

[0x90b6d740-0x90b7c5b4] /usr/lib/libauto.dylib

[0x90a39fa0-0x90a4cdf8] /usr/lib/libobjc.A.dylib

[0x92ef7914-0x92f05664] /System/Library/Frameworks/Carbon.framework/ 

Versions/A/Frameworks/ImageCapture.framework/Versions/A/Imag eCapture

[0x92f22fa0-0x92f2ef44] /System/Library/Frameworks/Carbon.framework/ 

Versions/A/Frameworks/SpeechRecognition.framework/Versions/A / 

[0x92f3f15c-0x92f4e20c] /System/Library/Frameworks/Carbon.framework/ 

# The exception above was detected in native code outside the VM

# Java VM: Java HotSpot(TM) Client VM (1.4.2-54 mixed mode)

This what I found in the console's log file (so it seems that Java is  
crashing and takes Max down with it):

STILL NOT FOUND*** PATH: Server HD RAID Set 1:/Library/Application  
Support/Cycling '74/Apr 25 00:14:16 XServe servermgrd: servermgr_dns:  
no name available via DNS for 193.175.148.231
Apr 25 00:14:16 XServe servermgrd: servermgr_dns: no hostname set and  
unable to detect via DNS, services may not function properly - use  
changeip to repair
MaxMSP qdport_enforce: location=max_eventtimerproc(2), port=48e8420,  
valid=0

Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: An  
unexpected Java error has been detected by HotSpot Virtual Machine:
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: An  
error report file has been written to:
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app:   / 
  Users/himem/Library/Logs/Java/JavaNativeCrash_pid9721.crash. log
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: If  
this error is reproducible, please report it with the following  
information:
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app:   1.  
Provide the steps to reproduce, a test case, and any relevant  
information
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app:   2.  
The corresponding JavaNativeCrash_pid.crash.log (Java state)
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app:   3.  
The corresponding .crash.log (native state; generated by  
CrashReporter)
Apr 25 00:22:48 XServe /Applications/MaxMSP 4.5/MaxMSP 4.5.app: File  
report at: http://bugreport.apple.com/
Apr 25 00:22:50 XServe crashdump[9800]: MaxMSP 4.5.app crashed
Apr 25 00:22:52 XServe crashdump[9800]: crash report written to: / 
Users/himem/Library/Logs/CrashReporter/MaxMSP 4.5.app.crash.log

# This JavaNativeCrash log describes the Java state at a Native Crash  
in a Java application.
# The corresponding native state can be found in the crash log  
generated by CrashReporter.

# If this error is reproducible, please report it with the following  
information:
#   1. Provide the steps to reproduce, a test case, and any relevant  
information
#   2. This JavaNativeCrash_pid.crash.log (Java state)
#   3. The corresponding .crash.log (native state; generated by  
CrashReporter)
# File report at: http://bugreport.apple.com/

An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : Bus Error occurred at PC=0x35207374
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:
Cannot find the last Java frame, printing stack disabled.

Dynamic libraries and executable:
[0x000019e0-0x000027f8] /System/Library/Frameworks/Carbon.framework/ 
Versions/A/Support/LaunchCFMApp
[0x908dbe74-0x908dbf44] /System/Library/Frameworks/ 
CoreServices.framework/Versions/A/CoreServices
[0x92ef4e68-0x92ef4f38] /System/Library/Frameworks/Carbon.framework/ 
Versions/A/Carbon
[0x8fa79d60-0x8fc8e920] /System/Library/Frameworks/ 
QuickTime.framework/Versions/A/QuickTime
[0x90000f60-0x9019638c] /usr/lib/libSystem.B.dylib
[0x90213e80-0x902165d8] /usr/lib/system/libmathCommon.A.dylib
[0x90b87040-0x90c66bd4] /System/Library/Frameworks/ 
  CoreServices.framework/Versions/A/Frameworks/CarbonCore.fram ework/ 
Versions/A/CarbonCore
[0x907b9eec-0x90869afc] /System/Library/Frameworks/ 
CoreFoundation.framework/Versions/A/CoreFoundation
[0x90ec4a18-0x90f23a2c] /System/Library/Frameworks/ 
  CoreServices.framework/Versions/A/Frameworks/OSServices.fram ework/ 
Versions/A/OSServices
[0x90f8de8c-0x90fc8710] /System/Library/Frameworks/ 
  CoreServices.framework/Versions/A/Frameworks/CFNetwork.frame work/ 
Versions/A/CFNetwork
[0x90fe4030-0x90ff7d5c] /System/Library/Frameworks/ 
CoreServices.framework/Versions/A/Frameworks/ 
WebServicesCore.framework/Versions/A/WebServicesCore
[0x9100c11c-0x9106f0bc] /System/Library/Frameworks/ 
  CoreServices.framework/Versions/A/Frameworks/SearchKit.frame work/ 
Versions/A/SearchKit
[0x910d2ca0-0x910f2564] /System/Library/Frameworks/ 
  CoreServices.framework/Versions/A/Frameworks/Metadata.framew ork/ 
Versions/A/Metadata
[0x90ae7c90-0x90b45a48] /System/Library/Frameworks/IOKit.framework/ 
Versions/A/IOKit
[0x908de680-0x909ce508] /usr/lib/libicucore.A.dylib
[0x9110c954-0x91116ad0] /usr/lib/libz.1.dylib
[0x9111da70-0x91241948] /System/Library/Frameworks/Security.framework/ 
Versions/A/Security
[0x913d0dc8-0x913d8a48] /System/Library/Frameworks/ 
DiskArbitration.framework/Versions/A/DiskArbitration
[0x913e06a0-0x91402158] /System/Library/Frameworks/ 
  SystemConfiguration.framework/Versions/A/SystemConfiguration
[0x9141b314-0x91425254] /usr/lib/libgcc_s.1.dylib
[0x90b6d740-0x90b7c5b4] /usr/lib/libauto.dylib
[0x90a39fa0-0x90a4cdf8] /usr/lib/libobjc.A.dylib
[0x92ef7914-0x92f05664] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/ImageCapture.framework/Versions/A/Imag eCapture
[0x92f22fa0-0x92f2ef44] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/SpeechRecognition.framework/Versions/A / 
SpeechRecognition
[0x92f3f15c-0x92f4e20c] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/SecurityHI.framework/Versions/A/Securi tyHI
[0x92f66364-0x92fd9470] /System/Library/Frameworks/Carbon.framework/ 
Versions/A/Frameworks/Ink.framework/Versions/A/Ink
[0x914eee4c-0x914eef1c] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/ApplicationServices
[0x93000fc0-0x930098e0] /System/Library/Frameworks/Carbon.framework/ 
Versions/A/Frameworks/Help.framework/Versions/A/Help
[0x93015b90-0x930364f4] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/OpenScripting.framework/Versions/A/Ope nScripting
[0x9305d248-0x93067ccc] /System/Library/Frameworks/Carbon.framework/ 
Versions/A/Frameworks/Print.framework/Versions/A/Print
[0x9307891c-0x930cca94] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/HTMLRendering.framework/Versions/A/HTM LRendering
[0x9310f10c-0x931510a4] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/NavigationServices.framework/Versions/ A/ 
NavigationServices
[0x9318c244-0x931a2fb8] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/CarbonSound.framework/Versions/A/Carbo nSound
[0x931bb3d0-0x931c4de8] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/CommonPanels.framework/Versions/A/Comm onPanels
[0x931d1cdc-0x93498b08] /System/Library/Frameworks/Carbon.framework/ 
  Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolb ox
[0x9290d88c-0x92aa5554] /System/Library/Frameworks/ 
Foundation.framework/Versions/C/Foundation
[0x92844520-0x928a8610] /System/Library/PrivateFrameworks/ 
  DesktopServicesPriv.framework/Versions/A/DesktopServicesPriv
[0x91436828-0x91492800] /System/Library/Frameworks/ 
CoreAudio.framework/Versions/A/CoreAudio
[0x914f1058-0x91521114] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/AE.frame work/ 
Versions/A/AE
[0x9029344c-0x90330154] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ATS.fram ework/ 
Versions/A/ATS
[0x915446f4-0x915a33ac] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
ColorSync.framework/Versions/A/ColorSync
[0x903735ac-0x906d386c] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
CoreGraphics.framework/Versions/A/CoreGraphics
[0x9021b148-0x9025c598] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
CoreText.framework/Versions/A/CoreText
[0x916669d4-0x916d1894] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
PrintCore.framework/Versions/A/PrintCore
[0x9173e484-0x917d6c38] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/QD.frame work/ 
Versions/A/QD
[0x91832610-0x91881a44] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
HIServices.framework/Versions/A/HIServices
[0x918bf748-0x918da228] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
LangAnalysis.framework/Versions/A/LangAnalysis
[0x918f46d8-0x91912690] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
FindByContent.framework/Versions/A/FindByContent
[0x9192c1a0-0x91964f7c] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
LaunchServices.framework/Versions/A/LaunchServices
[0x9198a080-0x919991cc] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
SpeechSynthesis.framework/Versions/A/SpeechSynthesis
[0x919ac9d0-0x919e04dc] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/ImageIO
[0x9142a858-0x9143227c] /usr/lib/libbsm.dylib
[0x91a012cc-0x91aa5524] /usr/lib/libcrypto.0.9.7.dylib
[0x91b16be8-0x91b28924] /usr/lib/libcups.2.dylib
[0x91b314c8-0x91b4b2d4] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libJPEG.dylib
[0x91b536ac-0x91bac574] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libJP2.dylib
[0x91bd875c-0x91bdcaa4] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libGIF.dylib
[0x91bde79c-0x91c23840] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libRaw.dylib
[0x91c2b15c-0x91c4a89c] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libTIFF.dylib
[0x91c6e5f4-0x91c84f98] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libPng.dylib
[0x91c8d384-0x91c8fb44] /System/Library/Frameworks/ 
  ApplicationServices.framework/Versions/A/Frameworks/ImageIO. framework/ 
Versions/A/Resources/libRadiance.dylib
[0x91c91ee0-0x91c91fb0] /System/Library/Frameworks/ 
Accelerate.framework/Versions/A/Accelerate
[0x91c94390-0x91d6fe08] /System/Library/Frameworks/ 
  Accelerate.framework/Versions/A/Frameworks/vImage.framework/ Versions/ 
A/vImage
[0x91d7c4c4-0x91d7c598] /System/Library/Frameworks/ 
  Accelerate.framework/Versions/A/Frameworks/vecLib.framework/ Versions/ 
A/vecLib
[0x91e06e40-0x91e6e0a4] /System/Library/Frameworks/ 
  Accelerate.framework/Versions/A/Frameworks/vecLib.framework/ Versions/ 
A/libvMisc.dylib
[0x91e7f740-0x91efca08] /System/Library/Frameworks/ 
  Accelerate.framework/Versions/A/Frameworks/vecLib.framework/ Versions/ 
A/libvDSP.dylib
[0x91f2e3a0-0x924af7b8] /System/Library/Frameworks/ 
  Accelerate.framework/Versions/A/Frameworks/vecLib.framework/ Versions/ 
A/libBLAS.dylib
[0x924e8760-0x9280d8a8] /System/Library/Frameworks/ 
  Accelerate.framework/Versions/A/Frameworks/vecLib.framework/ Versions/ 
A/libLAPACK.dylib
[0x92c55610-0x92d12a58] /usr/lib/libxml2.2.dylib
[0x92d53680-0x92d67aa0] /usr/lib/libiconv.2.dylib
[0x9411c568-0x941abfb4] /System/Library/Frameworks/ 
AudioToolbox.framework/Versions/A/AudioToolbox
[0x942305dc-0x94230f90] /System/Library/Frameworks/ 
AudioUnit.framework/Versions/A/AudioUnit
[0x946fc0e0-0x94750a08] /usr/lib/libstdc++.6.dylib
[0x98eac54c-0x98eacb90] /System/Library/Frameworks/ 
DVComponentGlue.framework/Versions/A/DVComponentGlue
[0x9738b8d8-0x9739017c] /System/Library/Frameworks/AGL.framework/ 
Versions/A/AGL
[0x9362cf2c-0x93636dc0] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/OpenGL
[0x92e539e4-0x92e71f4c] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Libraries/libGL.dylib
[0x92e7cdb8-0x92ecbed4] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Libraries/libGLU.dylib
[0x8ed741e0-0x8f6246c4] /System/Library/QuickTime/ 
  QuickTimeComponents.component/Contents/MacOS/QuickTimeCompon ents
[0x96b674f8-0x96b675cc] /System/Library/Frameworks/vecLib.framework/ 
Versions/A/vecLib
[0x94233dd0-0x94370060] /System/Library/Frameworks/ 
QuartzCore.framework/Versions/A/QuartzCore
[0x9447ec68-0x944a29dc] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Libraries/libGLImage.dylib
[0x01370548-0x0137ff50] /Library/Application Support/PACE Anti-Piracy/ 
iLokSupport.bundle/Contents/MacOS/iLokSupport
[0x01390fec-0x0139ce24] /System/Library/Extensions/IOUSBFamily.kext/ 
Contents/PlugIns/IOUSBLib.bundle/Contents/MacOS/IOUSBLib
[0x010673d4-0x01083a98] /Library/Frameworks/MaxAPI.framework/MaxAPI
[0x946dc144-0x946f1f34] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
CoreGraphics.framework/Versions/A/Resources/libRIP.A.dylib
[0x94689558-0x94694724] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
  CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib
[0x9671f890-0x96752088] /System/Library/Frameworks/CoreMIDI.framework/ 
CoreMIDI
[0x94671b4c-0x9467e29c] /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ 
  CoreGraphics.framework/Versions/A/Resources/libCGATS.A.dylib
[0x040d0988-0x040d1f40] /Library/Frameworks/MaxAudioAPI.framework/ 
MaxAudioAPI
[0x04452890-0x046193f8] /Library/Application Support/Cycling '74/ 
jitter-externals/Cg.framework/Cg
[0x8ec79460-0x8ec7bb4c] /System/Library/QuickTime/ 
QuickTimeH264.component/Contents/MacOS/QuickTimeH264
[0x8eba0e90-0x8ec54438] /System/Library/QuickTime/ 
  QuickTimeH264.component/Contents/Resources/QuickTimeH264.alt ivec
[0x98eba2e4-0x98ef97ec] /System/Library/Components/ 
VCH263Codec.component/VCH263Codec
[0x8e995cc0-0x8ea107c4] /System/Library/QuickTime/ 
QuickTimeMPEG4.component/Contents/MacOS/QuickTimeMPEG4
[0x04905b70-0x0497de9c] /System/Library/QuickTime/ 
ApplePixletVideo.component/Contents/MacOS/ApplePixletVideo
[0x9366adec-0x9366d558] /System/Library/Frameworks/JavaVM.framework/ 
JavaVM
[0x95bcd990-0x95ddfa88] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4/Libraries/libjvm.dylib
[0x98225b1c-0x9822e1e0] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4.2/Libraries/libverify.dylib
[0x982014f0-0x98217778] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4.2/Libraries/libjava.jnilib
[0x993d6728-0x993e0298] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4.2/Libraries/libzip.jnilib
[0x936b36b0-0x93bf1e94] /System/Library/Frameworks/AppKit.framework/ 
AppKit
[0x94073760-0x940cf5f0] /System/Library/Frameworks/CoreData.framework/ 
Versions/A/CoreData
[0x94439888-0x94470c80] /usr/lib/libsqlite3.0.dylib
[0x995a6f3c-0x99679ec4] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4.2/Libraries/libawt.jnilib
[0x936b0e74-0x936b0f44] /System/Library/Frameworks/Cocoa.framework/ 
Versions/A/Cocoa
[0x992eac2c-0x992ed1a8] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4.2/Libraries/libfontmanager.jnilib
[0x09d758d4-0x09d87b58] /System/Library/QuickTime/ 
  QuickTimeFirewireDV.component/Contents/MacOS/QuickTimeFireWi reDV
[0x98e10d30-0x98e2ca60] /System/Library/PrivateFrameworks/ 
OpenTransport.framework/OpenTransport
[0x94b40024-0x94b59458] /usr/lib/libresolv.9.dylib
[0x09f5ef44-0x09f5efa0] /System/Library/Components/ 
AppleScript.component/Contents/MacOS/AppleScript
[0x9854f40c-0x985dd2ec] /System/Library/PrivateFrameworks/ 
AppleScript.framework/Versions/A/AppleScript
[0x09f69db0-0x09f69f1c] /System/Library/ScriptingAdditions/Digital  
Hub Scripting.osax/Contents/MacOS/Digital Hub Scripting
[0x09fe178c-0x0a01013c] /System/Library/ScriptingAdditions/ 
StandardAdditions.osax/Contents/MacOS/StandardAdditions
[0x95bc4de0-0x95bc9434] /System/Library/PrivateFrameworks/ 
URLMount.framework/Versions/A/URLMount
[0x976779f4-0x976a2470] /System/Library/Frameworks/ 
  AppleShareClientCore.framework/Versions/A/AppleShareClientCo re
[0x9765772c-0x97664c80] /System/Library/Frameworks/ 
AppleShareClient.framework/Versions/A/AppleShareClient
[0x92e45044-0x92e4d59c] /System/Library/Frameworks/ 
AppleTalk.framework/Versions/A/AppleTalk
[0x95061e50-0x95163654] /System/Library/Frameworks/Kerberos.framework/ 
Versions/A/Kerberos
[0x0169e174-0x0169f9b4] /System/Library/TextEncodings/Unicode  
Encodings.bundle/Contents/MacOS/Unicode Encodings
[0x98f05214-0x98f4d2a0] /System/Library/PrivateFrameworks/ 
URLAccess.framework/Versions/A/URLAccess
[0x0a4153c4-0x0a51bd78] /System/Library/Frameworks/OpenGL.framework/ 
Resources/GLEngine.bundle/GLEngine
[0x9729cc5c-0x9733ef18] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Libraries/libGLProgrammability.dylib
[0x0a55281c-0x0a69a514] /System/Library/Extensions/ 
ATIRadeonGLDriver.bundle/Contents/MacOS/ATIRadeonGLDriver
[0x09f7b240-0x09f93ca4] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Resources/GLDriver.bundle/GLDriver
[0x97388788-0x97389938] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Libraries/libGLSystem.dylib
[0x0a0db4c4-0x0a0f56b0] /System/Library/Frameworks/OpenGL.framework/ 
Versions/A/Resources/GLRendererFloat.bundle/GLRendererFloat
[0x0a6a5abc-0x0a734ea4] /System/Library/Frameworks/OpenGL.framework/ 
Resources/GLRasterARGB8888D32.bundle/GLRasterARGB8888D32
[0x9938ce24-0x99394c2c] /System/Library/Frameworks/JavaVM.framework/ 
Versions/1.4.2/Libraries/libnet.jnilib

Local Time = Tue Apr 25 00:22:48 2006
Elapsed Time = 967458
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.2-54 mixed mode)
#

I just upgraded the server to Java 1.5.0 version 4. What are the Max 

BTW, the crash reporter now reports the following lines:

0 libjvm.dylib     0x9a757c74 JVM_GetLastErrorString 

1 libjvm.dylib     0x9a63e998 JNI_CreateJavaVM_Impl 

2 libjvm.dylib     0x9a63e88c JNI_CreateJavaVM_Impl 

3 libSystem.B.dylib     0x9002ba68 _pthread_body + 96

I'm going to check whether Java on Windows XP is better behaved.

I just upgraded the server to Java 1.5.0 version 4. What are the Max  
config files I need to change?

BTW, the crash reporter now reports the following lines:
Thread 4 Crashed:
0   libjvm.dylib                   	0x9a757c74 JVM_GetLastErrorString  
+ 8420
1   libjvm.dylib                   	0x9a63e998 JNI_CreateJavaVM_Impl  
+ 44252
2   libjvm.dylib                   	0x9a63e88c JNI_CreateJavaVM_Impl  
+ 43984
3   libSystem.B.dylib              	0x9002ba68 _pthread_body + 96

This looks to me like you need to set your hostname and set you FQDN 

OS X Server does not like DNS to be setup incorrectly. Ive seen many 

many installs where DNS was borked and causing all sorts of issues.

If you are using net.tcp, this might have some relation as well to 

java having issues. Are you using DNS hostnames or ip addresses to 

connect to other machines, can you ping all of your name servers?

Also, you are using NAT you say. Does your NAT router allow for a DMZ 

machine? What kind of router out of curiosity. Some routers lose 

track of the 'state' of TCP connections that are active for a long 

time. If you can experiment by connecting without the NAT, you could 

at least eliminate that possibility. NAT traversal can be tricky, as 

NAT doesnt work.. quite the same way on every router, although it 

should in theory. BTW, these are all just shots in the dark ;)

This looks to me like you need to set your hostname and set you FQDN  
(Fully Qualified Domain Name) properly.

OS X Server does not like DNS to be setup incorrectly. Ive seen many  
many installs where DNS was borked and causing all sorts of issues.

If you are using net.tcp, this might have some relation as well to  
java having issues. Are you using DNS hostnames or ip addresses to  
connect to other machines, can you ping all of your name servers?

Also, you are using NAT you say. Does your NAT router allow for a DMZ  
machine? What kind of router out of curiosity. Some routers lose  
track of the 'state' of TCP connections that are active for a long  
time. If you can experiment by connecting without the NAT, you could  
at least eliminate that possibility. NAT traversal can be tricky, as  
NAT doesnt work.. quite the same way on every router, although it  
should in theory. BTW, these are all just shots in the dark ;)

net.tcp.send is not robust