JR49742: COMETD CHANNELS RELATED TO IBM PROCESS PORTAL NOTIFICATIONS ARE RETAINED IN HEAP MEMORY

8.0.1.2-WS-BPM-IFJR49742
8.5.0.1-WS-BPM-IFJR49742
Version 8.5 Refresh Pack 5 for the IBM Business Process Manager products
Download Version 8.0.1 Fix Pack 3 for the IBM Business Process Manager products
Version 8.5.0 Fix Pack 2 for the IBM Business Process Manager products

APAR status

• Closed as program error.

Error description

• In the IBM Process Portal notification application, CometD
  channel objects might not be properly cleaned up when they are
  no longer needed. As a result, the LocalSession object continues
   to grow in heap memory and, eventually, you see an
  out-of-memory condition in the Java Virtual Machine where the
  application is deployed.
  
  The following heap dump example illustrates the issue:
  
  2,356,682,760 (76.81%) [32] 34 class
  com/ibm/bpm/socialbus/servlet/SocialBusServiceServlet 0x2395f30
  |- 2,356,577,448 (76.8%) [32] 9 class
  com/ibm/bpm/socialbus/bayeux/BayeuxServerHelper 0x2408fb8
     |- 2,356,577,192 (76.8%) [112] 19
  com/ibm/bpm/socialbus/servlet/SocialBusBayeuxServerImpl
  0x89a22c0
        |- 2,068,051,496 (67.4%) [48] 2
  java/util/concurrent/ConcurrentHashMap 0x89a3a30
           |- 2,068,051,432 (67.4%) [80] 16 array of
  java/util/concurrent/ConcurrentHashMap$Segment 0x89a69b8
              |- 2,024,873,952 (65.99%) [32] 2
  java/util/concurrent/ConcurrentHashMap$Segment 0x89aa728
                 |- 2,024,873,888 (65.99%) [131,088] 14,319 array
  of
  java/util/concurrent/ConcurrentHashMap$HashEntry 0x6c74a478
                    |- 2,021,662,032 (65.89%) [24] 2
  java/util/concurrent/ConcurrentHashMap$HashEntry 0x6f07a9d0
                       |- 2,021,661,984 (65.89%) [56] 10
  org/cometd/server/ServerChannelImpl 0x6f8a62f8
                          |- 2,021,658,976 (65.89%) [56] 10
  org/cometd/server/ServerChannelImpl 0x1fae32b0
                             |- 1,137,951,016 (37.09%) [56] 10
  org/cometd/server/ServerChannelImpl 0xb790900
                                |- 1,137,931,080 (37.09%) [56] 10
  org/cometd/server/ServerChannelImpl 0xb790958
                                   |- 1,137,928,488 (37.09%) [56]
  9
  org/cometd/server/ServerChannelImpl 0xb7908b0
                                      |- 1,137,927,640 (37.09%)
  [16] 2
  org/eclipse/jetty/util/ConcurrentHashSet 0xb794f48
                                         |- 1,137,927,608
  (37.09%) [48] 2
  java/util/concurrent/ConcurrentHashMap 0xb79f480
                                            |- 1,137,927,560
  (37.09%)
  [80] 16 array of java/util/concurrent/ConcurrentHashMap$Segment
  0xb79fbb0
                                               |- 1,137,926,136
  (37.09%)
  [32] 2 java/util/concurrent/ConcurrentHashMap$Segment 0xb7a0248
                                                  |- 1,137,926,072
  (37.09%) [24] 1 array of
  java/util/concurrent/ConcurrentHashMap$HashEntry 0xb7a11e8
  1,137,926,048
  (37.09%) [24] 2 java/util/concurrent/ConcurrentHashMap$HashEntry
  0x1e9bf540
  1,137,926,024
  (37.09%) [56] 10 org/cometd/server/ServerChannelImpl 0x1e9d9a90
  1,137,925,152 (37.09%) [16] 2
  
  PRODUCTS AFFECTED:
  IBM Business Process Manager (BPM) Advanced
  IBM BPM Standard
  IBM BPM Express
  

Local fix

• Important: Performing the following steps disables collaboration
  in Process Portal in addition to automatically refreshing the
  task list in the Work tab.
  
  1. Disable the server-generated notification HTTP traffic by
  changing <web-messaging-push enabled="true"> to
  <web-messaging-push enabled="false"> in the 100Custom.xml file.
  2. Disable the client-generated subscription HTTP traffic (POST
  requests), by applying interim fix JR48704. For more
  information, see JR48704: DELAYS OCCUR WHILE LOGGING INTO IBM
  PROCESS PORTAL BECAUSE COMETD POST SUBSCRIPTIONS ARE LARGE at
  http://www.ibm.com/support/docview.wss?uid=swg1JR48704.
  

Problem summary

• No additional information is available.
  

Problem conclusion

• A fix is available for IBM BPM V8.0.1.2 and V8.5.0.1 that
  properly cleans up the CometD channels in the Process Portal
  notification application.
  
  On Fix Central (http://www.ibm.com/support/fixcentral), search
  for JR49742:
  
   1. Select IBM Business Process Manager with your edition from
  the product selector, the installed version to the fix pack
  level, and your platform, and then click Continue.
   2. Select APAR or SPR, enter JR49742, and click Continue.
  
  When you download fix packages, ensure that you also download
  the readme file for each fix. Review each readme file for
  additional installation instructions and information about the
  fix.
  

Temporary fix

• Not applicable
  

Comments

APAR Information

• 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

  BPM ADVANCED

• Fixed component ID

  5725C9400

Applicable component levels

• R801 PSY

     UP

• R850 PSY

     UP