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Questions tagged [ibm-jvm]

The IBM® Java™ Virtual Machine (JVM) is the core component of the IBM Java Runtime Environment (JRE).

The IBM® Java™ Virtual Machine (JVM) is the core component of the IBM Java Runtime Environment (JRE). The IBM JRE includes the JVM, the class libraries (including the IBM ORB), and other files that provide the runtime support that is necessary for a Java application

The IBM Java Virtual Machine (JVM) technology consists of a set of subcomponents (building blocks). Each subcomponent defines a high-level logical grouping of functions in the IBM JVM. The core IBM JVM is built with the following set of default subcomponents that provides a compatible Java Virtual Machine.

  • Core interface
  • Execution management
  • Execution engine
  • Diagnostics
  • Class Loader
  • Data conversion
  • Locking
  • Storage
  • Hardware platform interface
31 questions
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Error accessing a Web Service with SSL

I have a program that is supposed to send a file to a web service, which requires an SSL connection. I run the program as follows: SET JAVA_HOME=C:\Program Files\Java\jre1.6.0_07 SET com.ibm.SSL.ConfigURL=ssl.client.props "%JAVA_HOME%\bin\java" -cp…
Elie
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How to detect whether String.substring copies the character data

I know that for Oracle Java 1.7 update 6 and newer, when using String.substring, the internal character array of the String is copied, and for older versions, it is shared. But I found no offical API that would tell me the current behavior. Use…
Thomas Mueller
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Websphere caonfiguration/ IBM JVM: pure java works much more slower that in tomcat

Good day, all. I Met next problem: Work on project that need to deploy on different env with WAS and tomcat. WAS docer img used: common/base-ibm-websphere:8.0.0.10 - 8.0 Architecture: x86_64 Name IBM WebSphere Application…
Nolik
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Resizing Direct Buffer Memory

I have an application running on Websphere 8.5, I know that the Heap Memory Size of this particular JVM was increased in the past. The committed memory now is 5.6GB but we are having memory issues related to Direct Buffer Memory and now we need to…
dinhokz
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WebSphere Application Hang

If a WebSphere Application is hung on z/OS, what steps should be taken to find the cause? So far, I took a Heap Dump, Java Core, and System Dump. None of the threads are deadlocked, no memory issues, and there does not seem to be an abundance of…
GC_
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Why is HttpUriRequest.getURI() returning null when the uri variable is not null?

SUMMARY I am encountering a unique scenario where a call to an instance of httpcomponents HttpUriRequest method getURI() is returning null, when the variable in the instance is not null. It is impossible in this scenario for HttpUriRequest.getURI()…
JoshDM
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spring-amqp compatibility with ibm jvm

I'm using spring-amqp with IBM JVM and when initializing a rabbit template to work with ssl it uses sunx509, but IBM JVM is not compatible with the algorithm so I get: java.security.NoSuchAlgorithmException: SunX509 KeyManagerFactory not…
nito1
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Does OpenJ9 support sun.misc.Contended annotation?

I've created a program to check if @sun.misc.Contended is in effect. The idea is that when @Contended is in effect, the field offsets in annotated class will be larger. I can see the expected difference in offsets on OpenJDK, if I specify the…
user7610
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MQ 5.7 & IBM jre8 , equivalant cipher suite for cipher spec "TRIPLE_DES_SHA_US"

I m trying to connect MQ7.5 using IBM JRE-8 over SSL . In MQ system they configured TRIPLE_DES_SHA_US and we are using SSL_RSA_WITH_3DES_EDE_CBC_SHA cipher suite in my java program to connect MQ. But it is giving below given error. MQJE001:…
Suresh Telagareddi
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large object area of the tenure space consistently 100%

Is it an issue if "loa" is consisting 100%? There free memory in other areas. If it is an in issue what is the proper solution? gc type="scavenge"
bobs_007
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Persistent Reusable JVM

I am trying to figure out if the IBM Persistent Reusable JVM is still relevant and supported with latest Java versions. There is very little I find when searching on internet. There is just this document that talks about it and it looks very old, it…
User2709
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ClearQuest java api in websphere application

I'm developing a web application that access a clearquest database via the Java API. It works fine under Tomcat. Now I have to convert that application to WebSphere Application Server 8.5.5. At the first call to Clearquest the application and the…
bkrgr1
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Massive performance loss when using IBM JVM on AIX 7

I have following piece of code: List array = new ArrayList<>(); for (int i = 0; i < 30000; i++) { array.add(Long.valueOf(i)); } for (int j = 0; j < 30000; j++) { for (int…
Uhla
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Cassandra MessagingService ServerSocket thread hangs during decommission

I'm running embedded Cassandra 1.2.18 within an application deployed on Websphere Application Server 8.5.0, with Java 1.6, JVM IBM J9 2.6 (shipped with the appserver). It starts up fine, and is perfectly usable. It's the only node in the Cassandra…
Ben Kirby
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Using Java JVM -xdump argument to print http wire data

I am using the IBM JRE, and I have a Java SDK which is used by 2 clients: A Java client, as well as a .NET client. On the Java client, I use the following settings to capture http…
Brent Gallagher
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