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Versions earlier than Java 1.6

You can apply the WhaTap agent on the versions earlier than Java 1.6. However, some functions are limited.

Java 1.5​

Java 1.5 supports the -javaagent option. However, there are restrictions on information inquiry for external threads, so some functions are limited.

The following functions do not work.

  • Real-time trace on active transactions

  • Stack analysis (Top stack, Unique stack, Active stack)

  • Detailed stack of the thread list

Java 1.4​

Java 1.4 does not have the -javaagent option. Install the WhaTap agent differently. Of course, Java 1.4 must be used for the whatap.agent.jar file.

whatap.java14.tracer-X.Y.Z.jar

Creating boot.jar​

Create boot.jar by using the setup.sh file. If [JAVA_HOME] is not entered, it automatically recognizes the current path as the location of JDK.

$ setup.sh [JAVA_HOME]

setup.sh execution result: whatap.java14.boot-X.Y.Z.jar

Installing in bootclasspath​

Using the bootclasspath option, add the built jar and tracer jar as prepend.

-Xbootclasspath/p:${WHATAP_HOME}/whatap.java14.boot-1.0.2.jar:${WHATAP_HOME}/whatap.java14.tracer-1.0.2.jar

Constraints​

In JDK 1.4, the following functions do not work.

  • Real-time trace on active transactions

  • Stack analysis (Top stack, Unique stack, Active stack)

  • Component version

  • Thread list, heap history

  • Loaded class

  • Open socket

  • Agent dump