SDK/RTE 1.4.2.28 Release Notes
Table Of Contents
- Table of Contents
- Overview
- Features
- Installation
- Usage Documentation
- Removing support for unwanted architectures in the JRE
- Support for dynamic thread local storage (TLS)
- Signal Chaining Functionality
- Support for C++ applications built with -AA and -AP options (PA-RISC) only
- Using Java 2 JNI on HP-UX
- HotSpot JVM Options
- Garbage collectors: Parallel, Concurrent mark, and Sweep
- Allocating physical memory and swap in the Java heap
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Closing a socket when accept or read is pending (PA-RISC) - new patch information!
- Compatibility with previous releases
- Runtime Plug-In usage and configuration
- GC log-rotation support
- ThreadDumpPath support
- Additional HP and Oracle Java documentation
- Problem Fixes
- PA-RISC Known issues
- Recommend setting PTHREAD_SUSPEND_SYNC to 1 under certain conditions (HP-UX 11.31 (11i v3))
- shl_load HotSpot libjvm problem due to TLS (HP-UX 11.0 PA-RISC)
- 64-bit Support X/Motif (HP-UX 11.00 & 11.11 (11i v1) PA-RISC)
- 64-bit Support - System Call (HP-UX 11.00 PA-RISC)
- /dev/poll Runtime Support (HP-UX 11.00 & 11.11 (11i v1) PA-RISC)
- HPjconfig Configuration Tool
- Compiler Safe Points (HP-UX 11.00 & 11.11 (11i v1) PA-RISC)
- Using Linker Option +noenvvar and +compat on HP Integrity and PA-64 Systems
- Running Java with setuid or setgid
- HP Integrity (Itanium) Known Issues
- Using pthread_suspend() under certain conditions on HP-UX 11.31 (11i v3)
- Initializing a JVM instance with JNI_CreateJavaVM or attaching to JVM with AttachCurrentThread()
- Using Linker Option +noenvvar and +compat on HP Integrity and PA-64 Systems
- Running Java with setuid or setgid
- Running Aries HP Integrity emulation on PA2.0
- Software Support
- Security fixes in the 1.4.2.28 release
"Tuning Garbage Collection with the 1.4.2 Java Virtual Machine" at http://
java.sun.com/docs/hotspot/gc1.4.2/index.html.
• Java Web Start bundled with the RTE
The files for Java Web Start technology are part of the jre in the directory javaws.
Web Start release notes are also included in the javaws directory.
• HeapDump Options:
For more information on the following HeapDump options, see the “HotSpot
Technology Tools and Commands” and “Interaction of HeapDump Options”
sections of the HP-UX Programmer's Guide for Java 2 on the BSC at http://
www.hp.com/go/hpux-java-docs.
— -XX:+HeapDump
The HeapDump command-line option can be used to observe memory allocation
in a running Java application by taking snapshots of the heap over time. Using
the _JAVA_HEAPDUMP=1 environment variable allows memory snapshots
to be taken without modifying the java command line. The HeapDump
functionality is available starting with SDK 1.4.2.10 and JDK 5.0.03.
— -XX:+HeapDumpOnly
The HeapDumpOnly option can be used to enable HP Heap Dumps using
SIGVTALARM signal (signal 20). Using the environment variable,
_JAVA_HEAPDUMP_ONLY, the HeapDump functionality is triggered without
modifying the java command line.
— -XX:+HeapDumpOnOutOfMemory
The -XX:+HeapDumpOnOutOfMemory command-line option causes the JVM
to dump a snapshot of the Java heap when an Out Of Memory error condition
has been reached. The HeapDumpOnOutOfMemory functionality is also available
in JDK 1.5.0.04.
— -XX:+HeapDumpOnCtrlBreak
The -XX:+HeapDumpOnCtrlBreak option enables the ability to take snapshots
of the Java heap when a SIGQUIT is sent to the Java process, without using the
jvmti-based -Xrunhprof:heap=dump. This feature is similar to the
-XX:+HeapDump option, except the output format is binary hprof format,
and is placed into a filename. The HeapDumpOnCtrlBreak functionality is
also available with JDK 5.0.05.
Equivalent Oracle release
HP's SDK/RTE 1.4.2.28 release includes Oracle's 1.4.2_29 - 1.4.2_36 releases' functionality.
(Note that on occasion HP backports defect and security fixes from a later Oracle release.
See the Defects fixed in the SDK 1.4.2.28 release (page 21) table and the Security fixes
in the 1.4.2.28 release (page 26) table for all fixes in this release.)
Features 9