Fixes are available
APAR status
Closed as program error.
Error description
When the V7.0 WebSphere MQ classes for JMS tracing is enabled for a long time, an OutOfMemory error is observed. The generated heap dump shows the following leak suspect: 246,668,272 (93%) [152] 1 com/ibm/rds/RDSCache 0xc216e8 246,668,120 (93%) [72] 4 java/util/logging/Logger 0xc21658 246,597,112 (93%) [24] 3 java/util/logging/LogManager 0x98f860 246,577,920 (93%) [40] 1 java/util/Hashtable 0xa0c298 246,577,880 (93%) [784] 98 array of java/util/Hashtable$Entry 0x21d3120 246,435,320 (93%) [32] 3 java/util/Hashtable$Entry 0x1259848 246,434,344 (93%) [72] 6 java/util/logging/Logger 0x125d398 246,434,152 (93%) [80] 1 array of java/util/logging/Handler 0x1262d80 246,434,072 (93%) [88] 12 java/util/logging/FileHandler 0x1264d38 246,409,784 (93%) [64] 5 com/ibm/msg/client/commonservices/j2se/trace/HumanFormatter 0x1264d90 246,368,608 (93%) [32] 4 com/ibm/msg/client/commonservices/j2se/trace /HumanFormatter$FastHashMap 0x12689c0 246,368,192 (93%) [48] 2 java/util/HashMap 0x1289fc8 246,368,128 (93%) [4,194,320] 417,238 array of java/util/HashMap$Entry 0xe905588 This issue is observed when the using the V7.0 WebSphere MQ classes for JMS tracing with wrapping options set and the output destination set to a file.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: This issue affects users of the V7.0 WebSphere MQ classes for JMS who enable the WebSphere MQ classes for JMS trace. Platforms affected: All Distributed (iSeries, all Unix and Windows) +Java **************************************************************** PROBLEM SUMMARY: One of the data structures used for maintaining the cache for WebSphere MQ JMS tracing was not being cleared. This led to a slow accumulation of objects in the java heap, which eventually led to a OutOfMemory error when tracing was left running for a long length of time.
Problem conclusion
The code fix associated with this APAR ensures that the number of objects in the cache do not overflow, and hence ensures that the java heap is not filled up while writing the trace output. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v7.0 Platform Fix Pack 7.0.1.6 -------- -------------------- Windows U200328 AIX U840698 HP-UX (PA-RISC) U841555 HP-UX (Itanium) U841560 Solaris (SPARC) U841556 Solaris (x86-64) U841562 iSeries tbc_p700_0_1_6 Linux (x86) U841557 Linux (x86-64) U841561 Linux (zSeries) U841558 Linux (Power) U841559 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available, information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IC73447
Reported component name
WMQ WINDOWS V7
Reported component ID
5724H7220
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-12-22
Closed date
2011-01-28
Last modified date
2011-02-08
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
WMQ WINDOWS V7
Fixed component ID
5724H7220
Applicable component levels
R700 PSY
UP
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Document Information
Modified date:
31 March 2023