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
or time synchronization utilities such as ntp will not be reflected in the date and time
that the Java program returns until the process is restarted.
If your application requires that system time changes are immediately reflected, you
can use the -XX:+UseGetTimeOfDay option to tell the JVM to use the gettimeofday
call instead of the new, lightweight mechanism. However you may notice a drop in
performance.
Profiling
In the SDK Version 1.4, a SIGPROF handler to support future profiling capability is
installed automatically. This may cause incompatibilities with other native code or
profiling tools which use SIGPROF.
You can turn off the SIGPROF handler by using the following option:
-XX:+ReduceSignalUsage
However, be aware that using this option also turns off the SIGQUIT handler, and you
therefore will not be able to get a Java stack trace.
Closing a socket when accept or read is pending (PA-RISC) - new patch information!
Because of changes to the mechanism by which a socket is closed in the VM, for all
supported HP-UX PA-RISC systems, you no longer need to use the
-XdoCloseWithReadPending option we recommended in earlier releases. However for
HP-UX 11.11 the following patches (or their superseded patches) are required:
PHKL_32457
PHKL_25840
PHKL_25842
PHNE_25644
PHNE_25084
For more detailed information, refer to “Closing a socket when accept or read is pending
(PA-RISC)” in the “HotSpot Technology Tools and Commands” section of the HP-UX
Programmer's Guide for Java 2.
Compatibility with previous releases
Oracle maintains upwards compatibility. Therefore, an application written for a 1.3
JVM will run on a 1.4 JVM. Downward compatibility is generally not supported because
new APIs are introduced that do not run on earlier JVMs.
For a detailed description of the incompatibilities between 1.3 and 1.4, refer to http://
java.sun.com/javase/compatibility_j2se1.4.html .
Runtime Plug-In usage and configuration
You can configure the Runtime Plug-In by running the Control Panel script, which
launches the Control Panel java application, or by loading ControlPanel.html in the
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