How do I solve problems with the "Software Problem"?

Question

I am working on a Java product. The client claims that the application can be broken after an arbitrary time. SInce is a crash, we can not find any information about our magazines.

• Are there any tools, methods to find out the causes of such problems?

• Can we do anything on the part of the code to get more information about such failures?

• Can I enable "DEBUG" mode for the JVM? If so, where can I find JVM log files / crash dumps?

• Any known procedures to solve such problems?

• If you encounter this problem, what will be your procedure in resolving this problem?

Answer 1

, JVM . , . JVM - , stdout, . ( ..), - stderr. , , stdout stderr ( , , ).

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Answer 2

verboser JVM , , JVisualVM - ( //gc/jmx), , hs_err_pid *.log. JVM ( ..). :

#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d741e3a, pid=1572, tid=1364
#
# Java VM: Java HotSpot(TM) Client VM (1.5.0_11-b03 mixed mode)
# Problematic frame:
# V  [jvm.dll+0x1e3a]
#

---------------  T H R E A D  ---------------

Current thread (0x00a85c78):  VMThread [id=1364]

siginfo: ExceptionCode=0xc0000005, reading address 0x00000054

Registers:
EAX=0x00000050, EBX=0x00990000, ECX=0x0847b9f8, EDX=0x00000050
ESP=0x0ab0f660, EBP=0x0ab0f684, ESI=0x0847b9f8, EDI=0x0847b9f8
EIP=0x6d741e3a, EFLAGS=0x00010216

Answer 3

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Answer 4

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Answer 5

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Answer 6

, :

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Answer 7

JNI ( , JNI), JVM, . , - .

Answer 8

In addition to all the other suggestions, check your code base for calls in System.exit ().