|Sun bug number||Brief description of limitation|
|4673298||Locking in Preferences sometimes fails on NFS mounted drives. NIO file locking over NFS might also be affected.|
At Version 1.4.2 (64-bit) and Version 5 (31-bit), the IBM Runtime Environment for z/OS contained new versions of the IBM Java Virtual Machine (JVM) and the Just-In-Time (JIT) compiler. If you are migrating from an older IBM Runtime Environment, note that:
Programs interacting with the 64-bit Java product, whether launching the JVM or being called from the JVM through the JNI interface, must be 64-bit programs. Programs dependent on JNI interfaces may require changes at the interface boundary to conform to 64-bit data types. Application JNI routines written in C will need to be recompiled for 64-bit, which may require some code changes.