JR58508: OUTOFMEMORY CONDITION WHEN USING PROJECT PATH MANAGEMENT ON COMPLEX BPDS

bpm.8600.cf2017.12.delta.repository

APAR status

• Closed as program error.

Error description

• Complex BPDs might cause an OutOfMemory condition in terms of
  the Projected Path Management. A heapdump analysis will show a
  pattern like:
  ----------------------------------------------------------------
  --------
  287,444,768 (9%) [48] 1 java/util/HashMap 0x15dd1b1c0
      287,444,720 (9%) [32,784] 3,407 array of
  java/util/HashMap$Entry 0x1800502b0
          659,160 (0%) [24] 3 java/util/HashMap$Entry 0x1a1f7b608
    379,040 (0%) [24] 3 java/util/HashMap$Entry 0x193ce0000
                  251,296 (0%) [136] 6
  com/lombardisoftware/data/criticalpath/CPNode 0x193cdfc78
                      209,136 (0%) [24] 1 java/util/ArrayList
  0x193cdfd18
                          209,112 (0%) [56] 5 array of
  java/lang/Object 0x1955e1da8
                              41,816 (0%) [24] 1 java/lang/String
  0x1955e1d90
                                  41,792 (0%) [41,792] 0 char[]
  0x1955d7a58
                              41,816 (0%) [24] 1 java/lang/String
  0x1956014b0
                              41,808 (0%) [24] 1 java/lang/String
  0x1955ec108
                              41,808 (0%) [24] 1 java/lang/String
  0x1955f7160
                              41,808 (0%) [24] 1 java/lang/String
  0x19560c428
                      41,896 (0%) [24] 1 java/util/ArrayList
  0x193cdfd00
                      128 (0%) [24] 1 java/util/ArrayList
  0x193cdfd30
                      41,808 (0%) [24] 1 java/lang/String
  0x193cdfc60
                      41,712 (0%) [24] 1 java/lang/String
  0x194712ee8
                      There are 1 more children
                  127,720 (0%) [24] 3 java/util/HashMap$Entry
  0x18c05d388
                  41,808 (0%) [24] 1 java/lang/String 0x193cdfc60
              280,096 (0%) [136] 6
  com/lombardisoftware/data/criticalpath/CPNode 0x1a1f7b280
              46,608 (0%) [24] 1 java/lang/String 0x1a1f7b268
          481,592 (0%) [24] 3 java/util/HashMap$Entry 0x1a7b26a98
          478,072 (0%) [24] 3 java/util/HashMap$Entry 0x1aaaea9e0
          475,032 (0%) [24] 3 java/util/HashMap$Entry 0x1a322b7e0
          469,768 (0%) [24] 3 java/util/HashMap$Entry 0x1a663c2e8
          There are 3,402 more children
  ----------------------------------------------------------------
  --------
  

Local fix

• Disable the Projected Path Management for the BPD during
  Development time (Process Designer). Although this disable the
  functionality, it prevents unexpected crashs of the JVM.
  

Problem summary

• When the Projected Path Management option is enabled for large
  BPDs, the JVM might crash with an OutOfMemoryError exception
  while calculating the path.
  

Problem conclusion

• A fix will be available in a IBM BPM V8.6.0.0 CF2017.12 that
  stops calculating the path after an amount of time that you can
  customize in the 100Custom.xml file by using the following
  property (introduced by APAR JR49413):
  
  <common>
      <critical-path>
          <calc-all-paths-processing-time-limit
  
  merge="replace">20</calc-all-paths-processing-time-limit>
      </critical-path>
  </common>
  
  This property cancels the calculation of the critical path when
  the time limit is exceeded. Each additional attempt to calculate
  the path is skipped during the JVM lifetime. Because the
  calculation is done at the BPD level, complex paths requiring
  more memory are avoided whereas smaller BPDs might still be
  processed. Restarting the JVM causes another attempt to
  calculate the path for future BPD instances. Using this property
  also affects the displayed details in the Gantt Chart and the
  Set Path: for the Gantt Chart, what will be returned can't be
  predicted because the calculation was impeded; for the Set Path,
  the critical path is no longer shown on the diagram being
  displayed.
  

Temporary fix

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

• R857 PSN

     UP