Contents

Title and Copyright Information

Preface

• About this Document
• Documentation Accessibility
• Conventions

1 Changes in Supported Configurations in Oracle JRockit JDK R28

• 1.1 Java Version Updates
• 1.2 Hardware Must Support Streaming SIMD Extensions (SSE) 2
• 1.3 J2SE 1.4.2 and JVMPI Not Supported
• 1.4 Itanium Platforms Not Supported

2 New Features and Changes in Oracle JRockit JDK R28

• 2.1 Changes in R28.2.3
  • 2.1.1 New Default Value for the -XX:MaxLargePageSize Command-Line Option
• 2.2 Changes in R28.2
  • 2.2.1 Improved JRockit Flight Recorder Heap Statistics Events
  • 2.2.2 Command-Line Options to Filter Exception Logging and Events
• 2.3 Changes in R28.1.5
  • 2.3.1 JRockit Mission Control Samples are No Longer Installed by Default
• 2.4 Changes in R28.1.0
  • 2.4.1 Improved Garbage Collection
  • 2.4.2 Command-Line Option to Specify the Receive Buffer Size
  • 2.4.3 Enabling JVM Crash When an Out-of-Memory Error Occurs
  • 2.4.4 Collecting and Packaging Flight Recording Data from Disk Buffers
• 2.5 Changes in R28.0.1
  • 2.5.1 Default MaxCodeMemory on Linux IA32 with Large Pages Increased to 64 MB
• 2.6 New Features and Changes in R28.0.0
  • 2.6.1 Change in Thread Suspension Mechanism
  • 2.6.2 Ability to Generate HPROF-Formatted Heap Dumps
  • 2.6.3 Improved Logging for Code Generation and Optimization
  • 2.6.4 Better Control Over Code Optimization Through Directives
  • 2.6.5 Garbage Collection Strategy Does Not Change at Run Time
  • 2.6.6 Large Objects Are Allocated in the Nursery
  • 2.6.7 Single Command-Line Option to Specify Compaction Behavior
  • 2.6.8 Changes in the JMX Agent
  • 2.6.9 Compressed References for Larger Heaps
  • 2.6.10 Changes in Heap Sizing
  • 2.6.11 Change in Class and Code Garbage Collection
  • 2.6.12 New Command-Line Options in R28.0
  • 2.6.13 Command-Line Options Deprecated in R28.0
  • 2.6.14 Command-Line Options Changed to the HotSpot Format in R28.0

3 Issues Resolved in Oracle JRockit JDK R28

• 3.1 Issues Resolved in R28.2.6
  • 3.1.1 JRockit Fight Recorder Repository Growing Indefinitely
  • 3.1.2 Applications with Dynamically-created Classes Running Out of Native Memory
  • 3.1.3 JMXMAPI Profiling API Can Now Profile All Versions of a Class
• 3.2 Issues Resolved in R28.2.5
  • 3.2.1 JRockit Crashes when Interned Strings are Allocated
  • 3.2.2 JRockit Crashes while Running with an optfile
  • 3.2.3 FileNotFoundException Thrown while Reading Files from FileInputStream
  • 3.2.4 Issue while Closing a NIO Socket
  • 3.2.5 NIO Operations Fail on Windows with a Security Exception
  • 3.2.6 Wrong Exception Thrown when Flight Recorder is Disabled
  • 3.2.7 JRockit Crashes while Invoking a com.sun.management Method
• 3.3 Issues Resolved in R28.2.4
  • 3.3.1 Issue with the jrcmd Command File Parsing
  • 3.3.2 Failure to Start on Solaris While Using a Large Page Size
• 3.4 Issues Resolved in R28.2.3
  • 3.4.1 Redirecting Ouput of the jrcmd Command to a Specified File
  • 3.4.2 Issue with the Limited File Size for the jrcmd Script File
  • 3.4.3 Issue while Reserving VMSpace
  • 3.4.4 Improved Stack Overflow Handling
  • 3.4.5 Issue while Optimizing a Method
  • 3.4.6 Issue with JRockit after Removing JRockit Flight Recorder
• 3.5 Issues Resolved in R28.2.2
  • 3.5.1 Exceptions are Thrown while Establishing SSL Connections that use Cipher Suite
  • 3.5.2 Issue with Code Optimization
• 3.6 Issues Resolved in R28.1.5
  • 3.6.1 Unable to Reserve Memory in the Low Address Space of the Java Heap
  • 3.6.2 Thread Starvation while Using the Default Number of Garbage Collection Threads in Multi-Core Machines
  • 3.6.3 Error while Setting SUID or SGID on JRockit JVM
• 3.7 Issues Resolved in R28.1.4
  • 3.7.1 Warnings Print When Launching Java Involving Symbolic Links on Windows
  • 3.7.2 Corrupt HPROF File
• 3.8 Issues Resolved in R28.1.3
  • 3.8.1 Deadlock Occurring in the ClassLoader (Sun Bug 7001933)
  • 3.8.2 "Peer Not Authenticated" Exception Unexpectedly Thrown (Sun Bug 6924489)
  • 3.8.3 Problem Setting SO_RCVBUF/SO_SNDBUF (Sun Bug 6984182)
  • 3.8.4 Passing Read-Only Bytebuffer to Channel Write Method Throwing Exception
  • 3.8.5 Specific JNI API Routines Did Not Correctly Set isCopy Parameter
  • 3.8.6 Incorrectly Optimized Methods Forcing Long Values to Become Very Large
• 3.9 Issues Resolved in R28.1.1
  • 3.9.1 Crashes During Concurrent Sweep JNI Object Allocation
  • 3.9.2 Silent Exit When Command-Line Options are Misspelled
  • 3.9.3 Erroneous Optimization of an arraycopy
  • 3.9.4 JDK Read Fixed Number of Bytes When Calling SecureRandom.generateSeed
  • 3.9.5 instanceof Check Failing
• 3.10 Issues Resolved in R28.1.0
  • 3.10.1 Oracle JRockit Hangs when used with Application Management Solutions
  • 3.10.2 Memory Leakage in the JMX Implementation
  • 3.10.3 Oracle JRockit Exits when Aborting an Optimization
  • 3.10.4 Oracle JRockit Heap Dumps Do Not Open in Eclipse Memory Analyzer
  • 3.10.5 Exceptions Thrown Without InvocationTargetException Wrapping
• 3.11 Issues Resolved in R28.0.2
  • 3.11.1 Oracle JRockit Starts Slowly on Some Solaris Machines
  • 3.11.2 IO Exceptions in Epoll Socket Muxer Would Throw NoClassDefFoundErrors
  • 3.11.3 Oracle JRockit Crashing While Pruning References to Obsoleted Code
  • 3.11.4 Oracle JRockit Could Not Open JAR or ZIP Files Larger Than 2GB
  • 3.11.5 Xalan and Xerces Versions Updated
• 3.12 Issues Resolved in R28.0.1
  • 3.12.1 JVM Crashes on Encountering Non-UTF8 Characters in Compiler Directives
  • 3.12.2 Null-Check Incorrectly Optimized or Proved as Always Failing
  • 3.12.3 Linux Systems Crash at Startup when libjsig.so is Set to be Preloaded
  • 3.12.4 NIO Selector Functionality Failure
  • 3.12.5 Deprecated Flag -XXExternalCompactRatio Gives Incorrect Warning
  • 3.12.6 ZipEntry Initialization Error
  • 3.12.7 Crash in ZLIB Code While Running Finalizer
  • 3.12.8 Undeterministic Behavior on x86_64 Machines
  • 3.12.9 JVM Spins Forever When Compiling JavaFX Classes
  • 3.12.10 Descriptions Not Intuitive for Compaction JFR Events
  • 3.12.11 WLS NIOSocketMuxer Occasionally Loses Sockets On Windows
• 3.13 Issues Resolved in R28.0.0
  • 3.13.1 ACopyRemoval Breaks Explicit Typechecks
  • 3.13.2 Deadlocks On the Windows Platform When Threads Block on I/O Operations
  • 3.13.3 Issues with Nondefault Flag with -XXcallProfiling in Oracle JRockit R27.x
  • 3.13.4 Performance Issues with Windows Computers Running Many Processes
  • 3.13.5 Optimizing Compiler Producing Erroneous Results
  • 3.13.6 Broken Java Launcher Removed from Product
  • 3.13.7 JVMTI_EVENT_COMPILED_METHOD_UNLOAD Event Not Being Posted

4 Known Issues in Oracle JRockit JDK R28

• 4.1 Call to Package.getPackages Can Cause NullPointerException
• 4.2 JRockit JVM Crashes while Debugging a Java Program Compiled with javac
• 4.3 Issue with Object Initialization in JRockit
• 4.4 Issues while Using 64-Bit Compressed References on SPARC
• 4.5 Error While Using print_utf8pool Command on Windows
• 4.6 HPROF Heap Dump Might be Corrupt When Multiple OOMs Thrown
• 4.7 JVM Crashing During GC When Running With -Xdebug or -agentlib:jdwp
• 4.8 java.math.BigDecimal Objects Cannot be Serialized Over IIOP Between Releases
• 4.9 Timing Stability Issue When "Fast Time" Is Enabled on Intel Systems
• 4.10 JMAPI Method Changed to Throw an UnapplicableMethodException
• 4.11 Error Message for CPU Load Counters for JRockit JVM Running on Windows
• 4.12 Oracle JRockit Hangs On OEL/OVM Combination
• 4.13 Triggering Young Collections if the Nursery is Too Small
• 4.14 SSE2 Registers Might Not be Restored Correctly After Return from Signal Handler
• 4.15 System Crashing when Stack Expansion Uses Randomized Address Spaces
• 4.16 Large Pages on Solaris Might Cause Long Pauses
• 4.17 Calculation-Intensive Applications Returning Corrupt Register Values
• 4.18 R28 Not Supported On Windows 2008 With More Than 64 Processors
• 4.19 Out of Memory Error Occurs When Classblock Memory Runs Low