Garbage collection Java Virtual Machine : Hewlett-Packard Hotspot release 1.3.1.01

"Hi,
I try and understand the mechanism of garbage collection of the Java Virtual Machine : Hewlett-Packard Hotspot release 1.3.1.01.
There is description of this mechanism in the pdf file : "memory management and garbage collection" available at the paragraph "Java performance tuning tutorial" at the page :
http://h21007.www2.hp.com/dspp/tech/tech_TechDocumentDetailPage_IDX/1,1701,1607,00.html
Regarding my question :
Below is an extract of the log file of garbage collections. This extract has 2 consecutive garbage collections.
(each begins with "<GC:").
<GC: 1 387875.630047 554 1258496 1 161087488 0 161087488 20119552 0 20119552
334758064 238778016 335544320
46294096 46294096 46399488 5.319209 >
<GC: 5 387926.615209 555 1258496 1 161087488 0 161087488 0 0 20119552
240036512 242217264 335544320
46317184 46317184 46399488 5.206192 >
There are 2 "full garbage collections", one of reason "1" and one of reason "5".
For the first one "Old generation After " =238778016
For the second "Old generation After " =238778016
Thus, "Old generation Before garbage collection" of the second is higher than "Old generation After garbage collection". Why?
I expected all objects to be allocated in the "Eden" space. And therefore I did not expect to s

I agree but my current Hp support is not very good on JVM issues.
Rob Woollen <[email protected]> wrote:
You'd probably be better off asking this question to HP.
-- Rob
Martial wrote:
The object of this mail is the Hewlett-Packard 1.3.1.01 Hotspot JavaVirtual Machine
release and its garbage collection mechanism.
I am interested in the "-Xverbosegc" option for garbage collectionmonitoring.
I have been through the online document :
http://www.hp.com/products1/unix/java/infolibrary/prog_guide/java1_3/hotspot.html#-Xverbosegc
I would like to find out more about the garbage collection mechanismand need
further information to understand the result of the log file generatedwith the
"-Xverbosegc"
For example here is an extract of a garbage collection log file generatedwith
Hewlett-Packard Hotspot Java Virtual Machine. Release 1.3.1.01.
These are 2 consecutive rows of the files :
<GC: 5 385565.750251 543 48 1 161087488 0 161087488 0 0 20119552 264184480255179792
335544320 46118384 46118384 46137344 5.514721 >
<GC: 1 385876.530728 544 1258496 1 161087488 0 161087488 20119552 020119552 334969696
255530640 335544320 46121664 46106304 46137344 6.768760 >
We have 2 full garbage collections, one of Reason 5 and the next oneof Reason
1.
What happened between these 2 garbage collections as we got : "Oldgeneration
After" of row 2 is higher than "Old generation Before" of row 1? Iexpected Objects
to be initially allocated in eden and so we could not get "old generation2modified
between the end of one garbage collection and before the next one.
Could you please clarify this issue and/or give more information aboutgarbage
collection mechanisms with the Hewlett-Packard Hotspot Java VirtualMachine. Release
1.3.1.01.

Similar Messages

Differences between Java Virtual Machine and Java HotSpot ??

I am little bit confused between Java Virtual Machine and Java HotSpot.
My understanding is:
Java Virtual Machine is the environment to execute Java programs. I think I could understand this part.
However, the description says, "The Java HotSpot product line consists of a server-side and a client-side virtual machine that share the Java HotSpot runtime environment, but have different compilers suited to the different performance characteristics of clients and servers."
I am confused with server-side virtual machine. what is that?? Does it mean the environment to execute Java programs remotely through network?? For example, Java plug-in.?? Please advise.

Hotspot is a JVM.
Hotspot has different configuration settings. Some of those settings are better suited for a client application. Some are better suited to server applications.

Jvm-java virtual machine

Hai iam new to this forum and as well i just started to learn java iwant to know in brief about JVM
i think it may be silly question but as i am bigginer to java kindly expect reply

georgemc wrote:
faustofrancis wrote:
A Java Virtual Machine (JVM) is a set of computer software programs and data structures which use a virtual machine model for the execution of other computer programs and scripts. The model used by a JVM accepts a form of computer intermediate language commonly referred to as Java bytecode. This language conceptually represents the instruction set of a stack-oriented, capability architecture.
Java Virtual Machines operate on Java bytecode, which is normally (but not necessarily) generated from Java source code; a JVM can also be used to implement programming languages other than Java. For example, Ada source code can be compiled to Java bytecode, which may then be executed by a JVM. JVMs can also be released by other companies besides Sun (the developer of Java) -- JVMs using the "Java" trademark may be developed by other companies as long as they adhere to the JVM specification published by Sun (and related contractual obligations).
The JVM is a crucial component of the Java Platform. Because JVMs are available for many hardware and software platforms, Java can be both middleware and a platform in its own right  hence the expression "write once, run anywhere." The use of the same bytecode for all platforms allows Java to be described as "compile once, run anywhere", as opposed to "write once, compile anywhere", which describes cross-platform compiled languages. The JVM also enables such unique features as Automated Exception Handling which provides 'root-cause' debugging information for every software error (exception) independent of the source code.
The JVM is distributed along with a set of standard class libraries which implement the Java API (Application Programming Interface). The virtual machine and API have to be consistent with each other[dubious  discuss] and are therefore bundled together as the Java Runtime Environment.
Execution environment
Programs intended to run on a JVM must be compiled into a standardized portable binary format, which typically comes in the form of .class files. A program may consist of many classes in different files. For easier distribution of large programs, multiple class files may be packaged together in a .jar file (short for Java archive).
The JVM runtime executes .class or .jar files, emulating the JVM instruction set by interpreting it, or using a just-in-time compiler (JIT) such as Sun's HotSpot. JIT compiling, not interpreting, is used in most JVMs today to achieve greater speed. Ahead-of-time compilers that enable the developer to precompile class files into native code for a particular platform also exist.
Like most virtual machines, the Java Virtual Machine has a stack-based architecture.
Although the JVM was primarily aimed at running compiled Java programs, other languages can now run on top of it[1], such as:
* Ruby, with JRuby
* JavaScript, with Rhino
* Python, with Jython
* Common Lisp, with Armed Bear Common Lisp
* Groovy
* Scala
[edit] Bytecode verifier
A basic philosophy of Java is that it is inherently "safe" from the standpoint that no user program can "crash" the host machine or otherwise interfere inappropriately with other operations on the host machine, and that it is possible to protect certain functions and data structures belonging to "trusted" code from access or corruption by "untrusted" code executing within the same JVM. Furthermore, common programmer errors that often lead to data corruption or unpredictable behavior such as accessing off the end of an array or using an uninitialized pointer are not allowed to occur. Several features of Java combine to provide this safety, including the class model, the garbage-collected heap, and the verifier.
The JVM verifies all bytecode before it is executed. This verification consists primarily of three types of checks:
* Branches are always to valid locations
* Data is always initialized and references are always type-safe
* Access to "private" or "package private" data and methods is rigidly controlled.
The first two of these checks take place primarily during the "verification" step which occurs when a class is loaded and made eligible for use. The third is primarily performed dynamically, when data items or methods of a class are first accessed by another class.
The verifier permits only some bytecode sequences in valid programs, e.g. a jump (branch) instruction can only target an instruction within the same function or method. Because of this, the fact that JVM is a stack architecture does not imply a speed penalty for emulation on register-based architectures when using a JIT compiler. In the face of the code-verified JVM architecture, it makes no difference to a JIT compiler whether it gets named imaginary registers or imaginary stack positions that need to be allocated to the target architecture's registers. In fact, code verification makes the JVM different from a classic stack architecture whose efficient emulation with a JIT compiler is more complicated and typically carried out by a slower interpreter.
Code verification also ensures that arbitrary bit patterns cannot get used as an address. Memory protection is achieved without the need for a MMU. Thus, JVM is an efficient way of getting memory protection on simple architectures that lack an MMU. This is analogous to managed code in Microsoft's .NET CLR, and conceptually similar to capability architectures such as the Plessey 250, and IBM System/38.
[edit] Bytecode instructions
Main article: Java bytecode
The JVM has instructions for the following groups of tasks:
* Load and store
* Arithmetic
* Type conversion
* Object creation and manipulation
* Operand stack management (push / pop)
* Control transfer (branching)
* Method invocation and return
* Throwing exceptions
* Monitor-based concurrency
The aim is binary compatibility. Each particular host operating system needs its own implementation of the JVM and runtime. These JVMs interpret the byte code semantically the same way, but the actual implementation may be different. More complicated than just the emulation of bytecode is compatible and efficient implementation of the Java core API which has to be mapped to each host operating system.
[edit] Secure execution of remote code
A virtual machine architecture allows very fine-grained control over the actions that code within the machine is permitted to take. This is designed to allow safe execution of untrusted code from remote sources, a model used by Java applets. Applets run within a VM incorporated into a user's browser, executing code downloaded from a remote HTTP server. The remote code runs in a restricted "sandbox", which is designed to protect the user from misbehaving or malicious code. Publishers can purchase a certificate with which to digitally sign applets as "safe", giving them permission to ask the user to break out of the sandbox and access the local file system and network...
[edit] C to bytecode compilers
From the point of view of a compiler Java bytecode is just another processor with an instruction set for which code can be generated. The JVM was originally designed to execute programs written in the Java language. However, the JVM provides an execution environment in the form of a bytecode instruction set and a runtime system that is general enough that it can be used as the target for compilers of other languages.
Because of its close association with Java the JVM performs the runtime checks mandated by the Java specification. This can make it technically difficult to translate C code (which is much more lax with regard to runtime checking) to the JVM and expect it to run without issuing any warnings.
Compilers targeting many different languages, including Ada and COBOL, have been written.
[edit] Licensing
Starting with J2SE 5.0, changes to the JVM specification have been developed under the Java Community Process as JSR 924[2]. As of 2006, changes to specification to support changes proposed to the class file format (JSR 202[3]) are being done as a maintenance release of JSR 924. The specification for the JVM is published in book form,[4] known as "blue book". The preface states:
We intend that this specification should sufficiently document the Java Virtual Machine to make possible compatible clean-room implementations. Sun provides tests which verify the proper operation of implementations of the Java Virtual Machine.
Sun's JVM is called HotSpot. Clean-room Java implementations include Kaffe and IBM J9. Sun retains control over the Java trademark, which it uses to certify implementation suites as fully compatible with Sun's specification.
[edit] See also
* HotSpot, Sun's Virtual Machine
* Da Vinci Machine, a starting Sun project aiming to prototype the extension of the JVM to add support for dynamic languages.
* List of Java virtual machines
* Automated Exception Handling
* Common Language Runtime
* Parrot virtual machine
* Java bytecode
* Class (file format)
* Java performance
* List of compilers
[edit] Notes
1. ^ Tolksdorf, Robert (2005). Languages for the Java VM. Retrieved on 2008-04-23.
2. ^ JSR 924  Specifies changes to the JVM specification starting with J2SE 5.0
3. ^ JSR 202  Specifies a number of changes to the class file format
4. ^ The Java Virtual Machine Specification (the first and second editions are also available online)
[edit] References
* Clarifications and Amendments to the Java Virtual Machine Specification, Second Edition includes list of changes to be made to support J2SE 5.0 and JSR 45
* JSR 45  Specifies changes to the class file format to support source-level debugging of languages such as JSP and SQLJ that are translated to Java
[edit] External links
* The Java Virtual Machine Specification
* Java-Virtual-Machine.net - All about Java Virtual Machines!
* List of languages which compile to the Java virtual machine.
* A decade after Java arrived, there have been improvements in the runtime performance of platform-independent virtual-machine based software.
* Kaffe.org - the Kaffe project
* JamVM - The Jam Virtual Machine
* The lean, mean, virtual machine - An introduction to the basic structure and functionality of the Java Virtual Machine
* Java Glossary - installing Java useful tips for installing Java for users and developers
* Test your Java Virtual Machine
* A list of Java VM-s used in mobile devices
* More Languages for the JVM
* Sun to build virtual machine for iPhone - ComputerWorldAre you aware that Wikipedia has ripped off your post?not yet?
Let me see if the systems work!

Could not create the Java virtual machine What happen?

all,good day!
i use tomcat7 and JRockit JVM;
tomcat7 version info:
Server version: Apache Tomcat/7.0.27
Server built: Mar 31 2012 03:43:36
Server number: 7.0.27.0
OS Name: Linux
OS Version: 2.6.32-220.el6.x86_64
Architecture: amd64
JVM Version: 1.6.0_02-b05
JVM Vendor: BEA Systems, Inc.
JRockit JVM version info:
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11)
Oracle JRockit(R) (build R28.2.2-7-148152-1.6.0_29-20111221-2104-linux-x86_64, compiled mode)
in R28 jrdoc ,The -XgcPrio option is deprecated in Oracle JRockit R28. The option works in R28, but Oracle recommends that you use -Xgc instead. For more information, see -Xgc;
in -Xgc option info lists the garbage collection modes that i can specify with the -Xgc option. pausetime mode in which the option；
but，but，i use -Xgc:pausetime in my tomcat7;tomcat startup error:
The configuration of the JVM attributes in Tomcat in catalina.sh
export JAVA_OPTS="-server -Xms25G -Xmx25G -XgcPrio:pausetime -XpauseTarget=200"
the error info:
[ERROR] Argument error: -Xgc:pausetime
[ERROR] pausetime is not a valid garbage collector name for -Xgc.
Valid options are: singlecon, gencon, genpar or parallel (singlepar).
[WARN ] No unit entered for pause time target, assuming ms.
Could not create the Java virtual machine.
what's wrong in my configuration ?
Edited by: 944618 on 2012-7-5 上午4:26

I would add the jvm flag -showversion next to the -Xgc:pausetime flag, so you will see which JVM you're actually running.
Also, the following part of your post is a bit inconsistent, which jvm flag are you actally using?
"but，but，i use -Xgc:pausetime in my tomcat7;tomcat startup error:
The configuration of the JVM attributes in Tomcat in catalina.sh
export JAVA_OPTS="-server -Xms25G -Xmx25G -XgcPrio:pausetime -XpauseTarget=200"
the error info:
[ERROR] Argument error: -Xgc:pausetime"
The error output you posted looks like the error you would get from a R27 version of JRockit.

The crash happened outside the java virtual machine in native code

Hi,
I have a biometric device with which I am given some C++ dlls. I am trying to call methods inside these using java (jna). I am loading the dll "zkemsdk.dll+" as follows:
zkemkeeper INSTANCE1 = (zkemkeeper)Native.loadLibrary("zkemsdk", zkemkeeper.class);//zkemsdk is the dll, I am loading the dll here.
Then, I am calling the function:
zkemkeeper.INSTANCE1.Z_Connect_NETEX("ip address",4370);//Z_Connect_NETEX is a function inside zkemsdk.dll
This returns me true or false based on whether am connected to the biometric device or not.Thus I am able to invoke this method without issues. But for other methods inside the dll, run time exception is thrown in console:
Can someone help me resolve this issue. ??? Following is the content of the log file generated.
# A fatal error has been detected by the Java Runtime Environment:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0351fe3b, pid=1664, tid=3832
# JRE version: 6.0_20-b02
# Java VM: Java HotSpot(TM) Client VM (16.3-b01 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [zkemsdk.dll+0xfe3b]
# If you would like to submit a bug report, please visit:
# http://www.java.net/external?url=http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
--------------- T H R E A D ---------------
Current thread (0x003a9000): JavaThread "main" [_thread_in_native, id=3832, stack(0x008c0000,0x00910000)]
siginfo: ExceptionCode=0xc0000005, reading address 0x00000106
Registers:
EAX=0x0090f7c4, EBX=0x00000001, ECX=0x00000000, EDX=0x00000001
ESP=0x0090f7b4, EBP=0x0090f848, ESI=0x00000096, EDI=0x003a9000
EIP=0x0351fe3b, EFLAGS=0x00010216
Top of Stack: (sp=0x0090f7b4)
0x0090f7b4: 00000000 0090f930 000003fc 00000103
0x0090f7c4: 0090f800 6d9532d0 373e92a0 00912ec5
0x0090f7d4: 00000401 0090f7d8 369860d1 0090f800
0x0090f7e4: 37390050 00000000 37390f90 00000000
0x0090f7f4: 0090f800 0090f930 003a9000 0090f830
0x0090f804: 10008fd8 0090f840 0090f930 00000008
0x0090f814: 0090f88c 0090fa28 0090f8f4 0090f848
0x0090f824: eb53f637 0351ffdc 00000096 00000003
Instructions: (pc=0x0351fe3b)
0x0351fe2b: 0f 53 50 8d 44 24 18 50 e8 58 7c 00 00 83 c4 0c
0x0351fe3b: 8b 4e 70 51 8b 0e 83 c3 04 53 6a 64 8d 54 24 18
Stack: [0x008c0000,0x00910000], sp=0x0090f7b4, free space=13d0090f2e8k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [zkemsdk.dll+0xfe3b]
C [jna5972695927945545932.tmp+0x9182]
C [jna5972695927945545932.tmp+0x2161]
C [jna5972695927945545932.tmp+0x2849]
j com.sun.jna.Function.invokeInt(I[Ljava/lang/Object;)I+0
j com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;+90
j com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+194
j com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+344
j $Proxy0.Z_Beep(J)Z+19
j com.rfarrays.bhabs.fingerPrint.main([Ljava/lang/String;)V+84
v ~StubRoutines::call_stub
V [jvm.dll+0xf049c]
V [jvm.dll+0x17fcf1]
V [jvm.dll+0xf051d]
V [jvm.dll+0xf9bc5]
V [jvm.dll+0x10181d]
C [javaw.exe+0x2155]
C [javaw.exe+0x8614]
C [kernel32.dll+0xb729]
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j com.sun.jna.Function.invokeInt(I[Ljava/lang/Object;)I+0
j com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;+90
j com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+194
j com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+344
j $Proxy0.Z_Beep(J)Z+19
j com.rfarrays.bhabs.fingerPrint.main([Ljava/lang/String;)V+84
v ~StubRoutines::call_stub
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
0x02b10c00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=1976, stack(0x02dc0000,0x02e10000)]
0x02b0a400 JavaThread "CompilerThread0" daemon [_thread_blocked, id=1280, stack(0x02d70000,0x02dc0000)]
0x02b08c00 JavaThread "Attach Listener" daemon [_thread_blocked, id=1984, stack(0x02d20000,0x02d70000)]
0x02b07800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=2160, stack(0x02cd0000,0x02d20000)]
0x02b02400 JavaThread "Finalizer" daemon [_thread_blocked, id=2052, stack(0x02c80000,0x02cd0000)]
0x02afd800 JavaThread "Reference Handler" daemon [_thread_blocked, id=752, stack(0x02c30000,0x02c80000)]
=>0x003a9000 JavaThread "main" [_thread_in_native, id=3832, stack(0x008c0000,0x00910000)]
Other Threads:
0x02afc400 VMThread [stack: 0x02be0000,0x02c30000] [id=1504]
0x02b1b800 WatcherThread [stack: 0x02e10000,0x02e60000] [id=1980]
VM state:not at safepoint (normal execution)
VM Mutex/Monitor currently owned by a thread: None
Heap
def new generation total 4928K, used 2455K [0x22970000, 0x22ec0000, 0x27ec0000)
eden space 4416K, 55% used [0x22970000, 0x22bd5db0, 0x22dc0000)
from space 512K, 0% used [0x22dc0000, 0x22dc0000, 0x22e40000)
to space 512K, 0% used [0x22e40000, 0x22e40000, 0x22ec0000)
tenured generation total 10944K, used 0K [0x27ec0000, 0x28970000, 0x32970000)
the space 10944K, 0% used [0x27ec0000, 0x27ec0000, 0x27ec0200, 0x28970000)
compacting perm gen total 12288K, used 343K [0x32970000, 0x33570000, 0x36970000)
the space 12288K, 2% used [0x32970000, 0x329c5f20, 0x329c6000, 0x33570000)
ro space 10240K, 51% used [0x36970000, 0x36e9ae00, 0x36e9ae00, 0x37370000)
rw space 12288K, 54% used [0x37370000, 0x37a072d8, 0x37a07400, 0x37f70000)
Dynamic libraries:
0x00400000 - 0x00424000 C:\Program Files\Java\jre6\bin\javaw.exe
0x7c900000 - 0x7c9b2000 C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c8f6000 C:\WINDOWS\system32\kernel32.dll
0x77dd0000 - 0x77e6b000 C:\WINDOWS\system32\ADVAPI32.dll
0x77e70000 - 0x77f03000 C:\WINDOWS\system32\RPCRT4.dll
0x77fe0000 - 0x77ff1000 C:\WINDOWS\system32\Secur32.dll
0x7e410000 - 0x7e4a1000 C:\WINDOWS\system32\USER32.dll
0x77f10000 - 0x77f59000 C:\WINDOWS\system32\GDI32.dll
0x76390000 - 0x763ad000 C:\WINDOWS\system32\IMM32.DLL
0x7c340000 - 0x7c396000 C:\Program Files\Java\jre6\bin\msvcr71.dll
0x6d800000 - 0x6da97000 C:\Program Files\Java\jre6\bin\client\jvm.dll
0x76b40000 - 0x76b6d000 C:\WINDOWS\system32\WINMM.dll
0x6d7b0000 - 0x6d7bc000 C:\Program Files\Java\jre6\bin\verify.dll
0x6d330000 - 0x6d34f000 C:\Program Files\Java\jre6\bin\java.dll
0x6d290000 - 0x6d298000 C:\Program Files\Java\jre6\bin\hpi.dll
0x76bf0000 - 0x76bfb000 C:\WINDOWS\system32\PSAPI.DLL
0x6d7f0000 - 0x6d7ff000 C:\Program Files\Java\jre6\bin\zip.dll
0x68000000 - 0x68036000 C:\WINDOWS\system32\rsaenh.dll
0x77c10000 - 0x77c68000 C:\WINDOWS\system32\msvcrt.dll
0x769c0000 - 0x76a74000 C:\WINDOWS\system32\USERENV.dll
0x5b860000 - 0x5b8b5000 C:\WINDOWS\system32\netapi32.dll
0x6d610000 - 0x6d623000 C:\Program Files\Java\jre6\bin\net.dll
0x71ab0000 - 0x71ac7000 C:\WINDOWS\system32\WS2_32.dll
0x71aa0000 - 0x71aa8000 C:\WINDOWS\system32\WS2HELP.dll
0x71a50000 - 0x71a8f000 C:\WINDOWS\System32\mswsock.dll
0x76f20000 - 0x76f47000 C:\WINDOWS\system32\DNSAPI.dll
0x76d60000 - 0x76d79000 C:\WINDOWS\system32\iphlpapi.dll
0x76fb0000 - 0x76fb8000 C:\WINDOWS\System32\winrnr.dll
0x76f60000 - 0x76f8c000 C:\WINDOWS\system32\WLDAP32.dll
0x76fc0000 - 0x76fc6000 C:\WINDOWS\system32\rasadhlp.dll
0x10000000 - 0x10052000 C:\Documents and Settings\bkonwar\Local Settings\Temp\jna5972695927945545932.tmp
0x03510000 - 0x03546000 C:\WINDOWS\system32\zkemsdk.dll
0x03560000 - 0x03574000 C:\WINDOWS\system32\commpro.dll
0x662b0000 - 0x66308000 C:\WINDOWS\system32\hnetcfg.dll
0x71a90000 - 0x71a98000 C:\WINDOWS\System32\wshtcpip.dll
VM Arguments:
jvm_args: -Dfile.encoding=Cp1252
java_command: com.xyz.bhabs.fingerPrint
Launcher Type: SUN_STANDARD
Environment Variables:
PATH=C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:/Program Files/Java/jre6/lib/i386;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;;C:\Program Files\Java\jre1.6.0_07\bin;C:\Program Files\Android\android-sdk-windows\tools;C:\Program Files\TortoiseSVN\bin
USERNAME=BKonwar
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 6 Model 15 Stepping 13, GenuineIntel
--------------- S Y S T E M ---------------
OS: Windows XP Build 2600 Service Pack 3
CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 13, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3
Memory: 4k page, physical 2085780k(1286036k free), swap 4024188k(3249652k free)
vm_info: Java HotSpot(TM) Client VM (16.3-b01) for windows-x86 JRE (1.6.0_20-b02), built on Apr 12 2010 13:52:23 by "java_re" with MS VC++ 7.1 (VS2003)
time: Wed May 25 10:02:24 2011
elapsed time: 21 seconds
Regards,
Bhabs
Edited by: 861222 on May 25, 2011 12:19 AM

861222 wrote:
# A fatal error has been detected by the Java Runtime Environment:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0351fe3b, pid=1664, tid=3832Not much to tell here. This line here looks suspiciously like a null-pointer error happening in the native code. It is impossible to say how, where and why. Go back to your code and start debugging I'd say, see where invalid data can be passed to the native code.

Could not create the Java virtual machine

Hello...
This is my jdev version 11.1.1.5.0
When I am running my project i am getting this type of error so what can i do for that
Here is that error:
*** Using port 7101 ***
"C:\Documents and Settings\Administrator\Application Data\JDeveloper\system11.1.1.5.37.60.13\DefaultDomain\bin\startWebLogic.cmd"
[waiting for the server to complete its initialization...]
JAVA Memory arguments: -Xms256m -Xmx512m -XX:CompileThreshold=8000 -XX:PermSize=128m -XX:MaxPermSize=512m
WLS Start Mode=Development
CLASSPATH=C:\Oracle\MIDDLE~1\ORACLE~1\modules\oracle.jdbc_11.1.1\ojdbc6dms.jar;C:\Oracle\MIDDLE~1\patch_wls1035\profiles\default\sys_manifest_classpath\weblogic_patch.jar;C:\Oracle\MIDDLE~1\patch_jdev1111\profiles\default\sys_manifest_classpath\weblogic_patch.jar;C:\Oracle\MIDDLE~1\JDK160~1\lib\tools.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\weblogic_sp.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\weblogic.jar;C:\Oracle\MIDDLE~1\modules\features\weblogic.server.modules_10.3.5.0.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\webservices.jar;C:\Oracle\MIDDLE~1\modules\ORGAPA~1.1/lib/ant-all.jar;C:\Oracle\MIDDLE~1\modules\NETSFA~1.0_1/lib/ant-contrib.jar;C:\Oracle\MIDDLE~1\ORACLE~1\modules\oracle.jrf_11.1.1\jrf.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\common\derby\lib\derbyclient.jar;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\xqrl.jar;C:\Program Files\Java\jdk1.6.0_16;.;
PATH=C:\Oracle\MIDDLE~1\patch_wls1035\profiles\default\native;C:\Oracle\MIDDLE~1\patch_jdev1111\profiles\default\native;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\native\win\32;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\bin;C:\Oracle\MIDDLE~1\modules\ORGAPA~1.1\bin;C:\Oracle\MIDDLE~1\JDK160~1\jre\bin;C:\Oracle\MIDDLE~1\JDK160~1\bin;D:\app\Administrator\product\11.2.0\dbhome_1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Java\jdk1.6.0_16\bin;.;;C:\Oracle\MIDDLE~1\WLSERV~1.3\server\native\win\32\oci920_8
* To start WebLogic Server, use a username and   *
* password assigned to an admin-level user. For *
* server administration, use the WebLogic Server *
* console at http:\\hostname:port\console        *
starting weblogic with Java version:
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b50)
Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode)
Starting WLS with line:
C:\Oracle\MIDDLE~1\JDK160~1\bin\java -client   -Xms256m -Xmx512m -XX:CompileThreshold=8000 -XX:PermSize=128m -XX:MaxPermSize=512m -Dweblogic.Name=DefaultServer -Djava.security.policy=C:\Oracle\MIDDLE~1\WLSERV~1.3\server\lib\weblogic.policy -Djavax.net.ssl.trustStore=C:\Oracle\Middleware\wlserver_10.3\server\lib\DemoTrust.jks -Dweblogic.nodemanager.ServiceEnabled=true -Xverify:none -da -Dplatform.home=C:\Oracle\MIDDLE~1\WLSERV~1.3 -Dwls.home=C:\Oracle\MIDDLE~1\WLSERV~1.3\server -Dweblogic.home=C:\Oracle\MIDDLE~1\WLSERV~1.3\server -Djps.app.credential.overwrite.allowed=true -Dcommon.components.home=C:\Oracle\MIDDLE~1\ORACLE~1 -Djrf.version=11.1.1 -Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger -Ddomain.home=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1 -Djrockit.optfile=C:\Oracle\MIDDLE~1\ORACLE~1\modules\oracle.jrf_11.1.1\jrocket_optfile.txt -Doracle.server.config.dir=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\config\FMWCON~1\servers\DefaultServer -Doracle.domain.config.dir=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\config\FMWCON~1 -Digf.arisidbeans.carmlloc=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\config\FMWCON~1\carml -Digf.arisidstack.home=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\config\FMWCON~1\arisidprovider -Doracle.security.jps.config=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\config\fmwconfig\jps-config.xml -Doracle.deployed.app.dir=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\servers\DefaultServer\tmp\_WL_user -Doracle.deployed.app.ext=\- -Dweblogic.alternateTypesDirectory=C:\Oracle\MIDDLE~1\ORACLE~1\modules\oracle.ossoiap_11.1.1,C:\Oracle\MIDDLE~1\ORACLE~1\modules\oracle.oamprovider_11.1.1 -Djava.protocol.handler.pkgs=oracle.mds.net.protocol -Dweblogic.jdbc.remoteEnabled=false -Dwsm.repository.path=C:\DOCUME~1\ADMINI~1\APPLIC~1\JDEVEL~1\SYSTEM~1.13\DEFAUL~1\oracle\store\gmds   -Dweblogic.management.discover=true -Dwlw.iterativeDev= -Dwlw.testConsole= -Dwlw.logErrorsToConsole= -Dweblogic.ext.dirs=C:\Oracle\MIDDLE~1\patch_wls1035\profiles\default\sysext_manifest_classpath;C:\Oracle\MIDDLE~1\patch_jdev1111\profiles\default\sysext_manifest_classpath weblogic.Server
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
Process exited.

Yesterday when i run that project at that time it successful compile and got output.
Today morning when i login in my PC and again i run that project once from there i am getting that massage......

Error : "Could not create the Java Virtual Machine"

Hi,
i am beginner in java. I am doing project making a small embedded linux system to run java app.
first i install JDK on my host (i686-linux 2.6.16-openSuse 10.1) and JRE on my target (i686-linux 2.4.32), both are version 1-5-. then I try to make the "Hello World!" program ,test it on the host, works fine.
then i put on my target system, but it didnt work. the error message was:
There was an error trying to initialize the HPI library
Please check your installation. Hotspot does not work correctly
when installed in the JDK 1.2 Linux Production Release, or
with any JDK 1.1.x release.
Could not create the Java virtual machine. thanks for any help and suggestion for the newbee

Maybe this older thread is of help:
http://forum.java.sun.com/thread.jspa?threadID=643395

Unrecognized option: -server Could not create the Java virtual machine.

Hi
I'm running JBoss 4.0 with JDK 1.5.0_12 (or could use 1.2.1 or 1.4.2) but when I try run.bat I get the following error
Unrecognized option: -server Could not create the Java virtual machine.
IfI try removing -server I get a different message
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/jboss/Main (Unsupported major.minor version 48.0)
Hope you can help. Really need to get this going ASAP
Thanks
Geri

Hi all,
Thanks for responding.
This is what I get when I did the following:
$java -version
java version "1.2.2"
Solaris VM (build Solaris_JDK_1.2.2_06, native threads, sunwjit)
$which java
/usr/bin/java
The java version was definitely not what I expected as I had installed the Java(TM) 2 Runtime Environment 1.3.1 and no Java hotspot was found even though I had already installed it. Maybe it because I did not install them correctly.
How do I get rid of the older version and replace it with a newer one?
I noticed that in later versions of J2SE, Hotspot VM was said to have been incorporated in it. But there are no guides on how to get Hotspot up and running, it will be great if anyone of you can guide me on this or point me to a site that can help me.
Please bear with me as I am still very new to this. Thanks!

Could not create the Java Virtual Machine. when deploy Android mobile App

Using Jdeveloper 11.1.2.3.0.... with Mobile App plugin.
I am working on deploying an Andriod mobile app to the emulator and most of the time I get the following....
Deployment failed due to one or more errors returned by 'C:\Temp\adt-bundle-windows-x86\sdk\platform-tools\dx.bat'. The following is a summary of the returned error(s):
Command-line execution failed (Return code: 1)
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Once in a great while I get it to work and the app deploys but 90% of the time I get this error.
I do start the emulator up before I even fire up JDeveloper so the emulator is up and running OK when i go to delpoy.
Any suggestions?
Thanks!

Hi.
Usually, this happens when there is no JDK in the PATH system variable. JDeveloper and WLS will work, but some external tools will fail. Can you please ensure that you have a reference to the <tt>bin</tt> subfolder of a Java SE 6 JDK in it? You should get something like this when you execute <tt>java -version</tt> on the command line:
java version "1.6.0_37"
Java(TM) SE Runtime Environment (build 1.6.0_37-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01, mixed mode)Best Regards,
Frédéric.

Java virtual machine internal thread?

Hello,
I just want to know how many the internal thread of java virtual machine.
I know that garbage collector is one thread. But there are always 7 or 8 other threads running even if i run single-threaded java program (only the main class). What thread are they?
Is class loader and execution engine have one thread each? How can they work and synchronize each other?
Thank you.

Just use jConsole (comes with the JDK/SDK) and connect to your running JVM. In the "Threads" tab you see all threads by name and stack traces.
In our server app there are several threads not from our application that run:
ReferenceHandler
Finalizer
SignalDispatcher
Timer-0
DestroyJavaVM
RMI LeaseChecker
RMI TCP Accept-0
RMI TCP Accept-567
RMI TCP Connection...
while all the RMI threads are probably from the jConsole connection.

IDM's config.sh failed on "Could not create the Java virtual machine"

I have OL5.7 32bit(Oracle Linux) set 2.5GB RAM. Installed rcu11.1.1.5's schemas, wls10.3.5, idm11.1.1.2.0 and patched to tdm11.1.1.5.0
I tried to configure IDM's components OID, OVD and ODSM and to create the domain for these.
ORACLE_HOME=/u01/app/oracle/FM/Oracle_IDM1
<ORACLE_HOME>/bin/config.sh
error msg:
>
[oracle@buoel57 bin]$ ./config.sh
Starting Fusion Middleware Configuration Wizard
ORACLE_HOME set as /u01/app/oracle/FM/Oracle_IDM1
PATH set as /u01/app/oracle/FM/Oracle_IDM1/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/home/oracle/bin:/home/oracle/bin
LD_LIBRARY_PATH set as /u01/app/oracle/FM/Oracle_IDM1/lib
Starting Oracle Universal Installer...
Checking swap space: must be greater than 500 MB. Actual 4191 MB Passed
Checking monitor: must be configured to display at least 256 colors. Actual 65536 Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2011-11-24_10-07-38AM. Please wait ...[oracle@buoel57 bin]$
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
[oracle@buoel57 bin]$
>
Java info
>
[oracle@buoel57 bin]$ which java
/u01/app/oracle/FM/jdk160_24/bin/java
[oracle@buoel57 bin]$ java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b50)
Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode)
[oracle@buoel57 bin]$
>
Where should I start to look?
The log as follow, no much info
>
[oracle@buoel57 logs]$ more installActions2011-11-24_12-04-36PM.log
The file oraparam.ini could not be found at /u01/app/oracle/FM/Oracle_IDM1/bin/../oui/bin/oraparam.ini
Using paramFile: /u01/app/oracle/FM/Oracle_IDM1/oui/oraparam.ini
Checking swap space: must be greater than 500 MB. Actual 4191 MB Passed
Checking monitor: must be configured to display at least 256 colors. Actual 65536 Passed
The number of files bootstrapped for the jre is 699.
The number of files bootstrapped for the oui is 100.
Using the umask value '027' available from oraparam.ini
Execvp of the child jre : the cmdline is /tmp/OraInstall2011-11-24_12-04-36PM/jre/bin/java, and the argv is
/tmp/OraInstall2011-11-24_12-04-36PM/jre/bin/java
-Doracle.installer.library_loc=/tmp/OraInstall2011-11-24_12-04-36PM/oui/lib/linux
-Doracle.installer.oui_loc=/tmp/OraInstall2011-11-24_12-04-36PM/oui
-Doracle.installer.bootstrap=TRUE
-Doracle.installer.startup_location=/u01/app/oracle/FM/Oracle_IDM1/oui/bin
-Doracle.installer.jre_loc=../../jre
-Doracle.installer.nlsEnabled="TRUE"
-Doracle.installer.prereqConfigLoc=/tmp/OraInstall2011-11-24_12-04-36PM/prereq
-Doracle.installer.unixVersion=2.6.32-200.13.1.el5uek
-mx1024m
-XX:MaxPermSize=1024m
-cp
/tmp/OraInstall2011-11-24_12-04-36PM::/tmp/OraInstall2011-11-24_12-04-36PM/ext/jlib/enginehelp.jar:/tmp/OraInstall2011-11-24_12-04-3
6PM/ext/jlib/dms.jar:/tmp/OraInstall2011-11-24_12-04-36PM/ext/jlib/commonutils.jar:/tmp/OraInstall2011-11-24_12-04-36PM/ext/jlib/mes
sage.jar:/tmp/OraInstall2011-11-24_12-04-36PM/ext/jlib/glassfish.jaxb.xjc_1.2.0.0_2-1-7.jar:/tmp/OraInstall2011-11-24_12-04-36PM/ext
lib/ojmisc.jar:/tmp/OraInstall2011-11-24_12-04-36PM/oui/jlib/xml.jar:/tmp/OraInstall2011-11-24_12-04-36PM/oui/jlib/srvm.jar:/tmp/Ora
Install2011-11-24_12-04-36PM/oui/jlib/classes12.jar
oracle.sysman.oio.oioc.OiocOneClickInstaller
UnixGroups="{oinstall,dba,}"
-scratchPath
/tmp/OraInstall2011-11-24_12-04-36PM
-sourceType
network
-timestamp
2011-11-24_12-04-36PM
-weblogicConfig
ORACLE_HOME=/u01/app/oracle/FM/Oracle_IDM1
-invPtrLoc
/u01/app/oracle/FM/Oracle_IDM1/oraInst.loc
-oneclick
-Doracle.config.mode=true
[oracle@buoel57 logs]$
[oracle@buoel57 logs]$

Looks like you do not have enough free memory to create the 1GB Java VM you are trying to create. Have you checked that the server has enough free RAM?

How does JVM (Java Virtual Machine) relate to XI?

Can somebody describe to me exactly what JVM (Java Virtual Machine) is and how it is related/associated to XI? Responses are appreciated, thanks in advance!

HI,
A Java Virtual Machine (JVM), is a virtual machine that interprets and executes Java bytecode. This code is most often generated by Java language compilers, although the JVM can also be targeted by compilers of other languages. JVMs may be developed by other companies as long as they adhere to the JVM standard published by Sun.
The JVM is a crucial component of the Java Platform. Because JVMs are available for many hardware and software platforms, Java can be both middleware and a platform in its own right - hence the expression "Write once, run anywhere." The use of the same bytecode for all platforms allows Java to be described as "Compile once, run anywhere", as opposed to "Write once, compile anywhere", which describes cross-platform compiled languages.
Starting with J2SE 5.0, changes to the JVM specification have been developed under the Java Community Process as JSR 924[1]. As of 2006, changes to specification to support changes proposed to the class file format (JSR 202[2]) are being done as a maintenance release of JSR 924. The specification for the JVM is published in book form[3], known as "blue book". The preface states:
We intend that this specification should sufficiently document the Java Virtual Machine to make possible compatible clean-room implementations. Sun provides tests which verify the proper operation of implementations of the Java Virtual Machine.
Sun's JVM is called HotSpot. Clean-room Java implementations include Kaffe and IBM's. Sun retains control over the Java trademark, which it uses to certify implementation suites as fully compatible with Sun's specification
we have two caches JAVA,ABAP.
i mean all objects which will execute in JAVA Cache those need the JVM.
Regards
Chilla

I have updated my iTunes to the newest version, 10-25 on a windows XP system. Now my java virtual machine is not working and I need it to run applet window. My Java is also newest version. What can I do to fix/repair my issue?

I need help with java on windowsXP after updating iTunes to the latest version. My java will not work and I get error message need java virtual machine to run applet window. Did not have this problem prior to the iTunes update.
Please help, Thanks

If your library was working on your computer and then popped up empty all of a sudden then this might be what you need...
Empty/corrupt library after upgrade/crash
Hopefully it's not been too long since you last upgraded iTunes, in fact if you get an empty/incomplete library immediately after upgrading then with the following steps you shouldn't lose a thing or need to do any further housekeeping. In the Previous iTunes Libraries folder should be a number of dated iTunes Library files. Take the most recent of these and copy it into the iTunes folder. Rename iTunes Library.itl as iTunes Library (Corrupt).itl and then rename the restored file as iTunes Library.itl. Start iTunes. Should all be good, bar any recent additions to or deletions from your library.
See iTunes Folder Watch for a tool to catch up with any changes since the backup file was created.
When you get it all working make a backup!
tt2

Could not find a valid Java virtual machine to load

On a fresh copy of CFMX8, when I run updater 7, it responds
'Could not find a valid Java virtual machine to load'.
This is being installed on a Win2K3 server and this is on a
'freshly minted' POC box solely for the purpose of
installing/testing CFMX8 to determine how it compares to our
CFMX6.1 environment.
You will notice that it is NOT being installed in the default
directory:
JRun Version Information
Vendor Macromedia
Product Name JRun 4.0
Build Number 108487
Version Full Version
License Type Trial License
Serial Number JRD400-69341-58259-30688
JRun 3.x Serial Number
Restricted to Single IP No
Installation Root D:\ISG\software\jrun4
Expiration Date Mar 29, 2008
Evaluation Days Remaining 29
JDK path (JAVA_HOME): D:/ISG/software/jrun4/jre
I do find it curious that I can run the Updater 6, and it
seems to behave properly (it finds the VM). I ran it just as a
test, then wiped everything to start over from scratch. For some
reason do I need to direct Updater 7 to the installation that I did
not have to do in Updater 6?
Thank you in advance for your assistance - Jacques

tried executing the following cmd, below is the following error:
<<command i executed>>
C:\Program Files\Java\jre1.5.0_09\bin>java -classpath "C:\Program Files\Java\jre1.5.0_09\lib\javaws.jar" com.sun.javaws.Main https://<IPddr>:8443/sample.jnlp
Can you pls let me know how it can be resolved?Umm.. I am not sure, but I will start with
a question. Why not do it this way?C:\Program Files\Java\jre1.5.0_09\bin>javaws https://<IPddr>:8443/sample.jnlp

Could not initialize the Java Virtual Machine

While trying to configure the turnkey product I encounter an error in starting the JBoss for Adobe LiveCycle ES v8.0 service. The JBossService.exe ends up showing in the task list - but the service shows its status as "starting" and an enty stating: "Could not initialize the Java Virtual Machine" is placed in the event log. I've seen a posting on this form that traced at least some of these symptoms to the account under which the service is configured to run - but I don't believe that solution applies in this case - I'm starting the service under the System Account which has all the permissions it needs to start the service.

Thanks very much for the suggestion. Indeed, the problem turned out to be memory related - I was able to correct the issue by updating the registry keys "JVM Option Number 4" and "JVM Option Number 5" so specify lower values. For some reason the system didn't like the 1024 meg size that was set by default (our server has 2 gig of memory).

Garbage collection Java Virtual Machine : Hewlett-Packard Hotspot release 1.3.1.01

Similar Messages

Maybe you are looking for