IZ70320: ZIPFILE.CLOSE() DOESN'T CLOSE INPUTSTREAMS OPENED WITH ZIPFILE.GETINPUTSTREAM().
Closed as program error.
Error Message: Native OutOfMemoryError caused by exhaustion of virtual address space, particularly on Windows 32-bit. Many small leaking allocations observed in the native C/C++ runtime heap, particularly 56-byte allocations. These allocations cause fragmentation of the native C/C++ runtime heap. The total amount of leaked memory is relatively small, but the amount of memory reserved for heap extensions is large (typified by large jumps in the amount of virtual address space in the memory map for the process). . Stack Trace: java/lang/OutOfMemoryError Stack trace varies. . The first pointer in leaking 56-byte allocation should point to an ANSI string representing a zip file entry name. Many duplicates of the same entry names may be seen (these entry names may correspond to resources loaded using ClassLoader.getResourceAsStream(), particularly when the classloader is a WebSphere Application Server classloader).
Ensure that your application calls ZipFileInputStream.close() explicitly. This includes Middleware code.
ZipFile.close() does not close streams that have been opened using ZipFile.getInputStream(), as the JavaDoc describes it should. When the pattern of use for ZipFile is to: 1. Open ZipFile 2. Call ZipFile.getInputStream() without subsequently calling close() direcly on the InputStreams 3. Call ZipFile.close() Then native memory associated with the returned InputStreams is not freed as it should be. Note, the above pattern of use is perfectly valid according to the JavaDoc, and appears to be in use by some WebSphere Application Server's classloaders in response to ClassLoader.getResourceAsStream().
This defect will be fixed in: 5.0.0 SR12 . ZipFile.close() can now call close() on any InputStreams that have been opened using ZipFile.getInputStream(), but have not yet been closed explicitly by application. A new Java option is introduced to turn on this behaviour as there may be performance impact to add this support. Solution is either application closes the InpustStreams explicitly or run your Java applications with "-Dcom.ibm.zipfile.closeinputstreams=true". . To obtain the fix: Install build 20100402 or later
Reported component name
JAVA 5 CLASS LI
Reported component ID
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
JAVA 5 CLASS LI
Fixed component ID
Applicable component levels