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https://issues.apache.org/jira/browse/STR-3217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482583#comment-13482583
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Lukasz Lenart commented on STR-3217:
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Did you try to upgrade to latest version ? 1.0.2 is quite old release :\
> Title : Memory leak occurred on the org/apache/struts/util/FastHashMap.
> -----------------------------------------------------------------------
>
> Key: STR-3217
> URL: https://issues.apache.org/jira/browse/STR-3217
> Project: Struts 1
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.2
> Environment: IT Environment :
> z/OS V1.11
> WAS for z/OS 7.0.19,
> Struts: The version is may be 1.0.2.:
> The MANIFEST.MF file in struts.jar contents is as below.
> Manifest-Version: 1.0
> Implementation-Version: 1.0.2
> Specification-Title: Struts Framework
> Specification-Version: 1.0
> Implementation-Title: Struts Framework
> Extension-Name: Struts Framework
> Created-By: Ant 1.4.1
> Implementation-Vendor-Id: org.apache
> Implementation-Vendor: Apache Software Foundation
> Specification-Vendor: Apache Software Foundation
> Reporter: Jung,Joon Young
> Priority: Critical
> Original Estimate: 504h
> Remaining Estimate: 504h
>
> Hello,
> Recently, we received Memory leak problems from WAS for z/OS system.
> ( IT Environment : z/OS V1.11,WAS for z/OS 7.0.19,
> Struts: The version is may be 1.0.2.: The MANIFEST.MF file in struts.jar
> contents is as below.
> Manifest-Version: 1.0
> Implementation-Version: 1.0.2
> Specification-Title: Struts Framework
> Specification-Version: 1.0
> Implementation-Title: Struts Framework
> Extension-Name: Struts Framework
> Created-By: Ant 1.4.1
> Implementation-Vendor-Id: org.apache
> Implementation-Vendor: Apache Software Foundation
> Specification-Vendor: Apache Software Foundation )
> After heap dump analysis, we found that the root cause of memory leak
> problems is FastHashMap.
> :220,493,664 (16%) [104] 2 org/apache/struts/util/FastHashMap 0x839ba6618
> There are many FastHashMap entries in the Heap dump.
> How can I fix the memory leak problems from FastHashMap ?
> If you know, please let me advise.
> Please refer to the below result from Heap dump analysis.
> I will waiting for your expertise advise.
> [Heap Dump Analysis result]
> 223,305,648 (16%) [64] 2 com/ibm/ws/cache/servlet/ServletWrapper 0x839ba6dd0
> 223,305,352 (16%) [240] 20 org/apache/struts/action/ActionServlet 0x839ba6538
> 220,493,664 (16%) [104] 2 org/apache/struts/util/FastHashMap 0x839ba6618
> 220,493,416 (16%) [88] 1 java/util/HashMap 0x86f285220
> 220,493,328 (16%) [4,112] 230 array of java/util/HashMap$Entry 0x86f285b58
> 38,777,480 (2%) [72] 2 java/util/HashMap$Entry 0x86f287580 <--- 1)
> Please
> 11,773,272 (0%) [72] 3 java/util/HashMap$Entry 0x86f289110 <--- 2)
> refer to
> 11,334,272 (0%) [72] 2 java/util/HashMap$Entry 0x86f288f88 <--- 3)
> the below.
> 11,287,736 (0%) [72] 2 java/util/HashMap$Entry 0x86f288460
> 9,291,168 (0%) [72] 2 java/util/HashMap$Entry 0x86f286be0
> 8,558,520 (0%) [72] 3 java/util/HashMap$Entry 0x86f285a78
> 8,149,584 (0%) [72] 2 java/util/HashMap$Entry 0x86f289ab0
> 7,790,768 (0%) [72] 2 java/util/HashMap$Entry 0x86f289618
> 7,404,624 (0%) [72] 3 java/util/HashMap$Entry 0x86f289b90
> 7,106,208 (0%) [72] 3 java/util/HashMap$Entry 0x86f288818
> 7,074,480 (0%) [72] 3 java/util/HashMap$Entry 0x86f285688
> 4,965,384 (0%) [72] 2 java/util/HashMap$Entry 0x86f286cf8
> 4,888,064 (0%) [72] 3 java/util/HashMap$Entry 0x86f287b30
> 3,716,624 (0%) [72] 2 java/util/HashMap$Entry 0x86f287a18
> 3,623,008 (0%) [72] 2 java/util/HashMap$Entry 0x86f2858f0
> 3,439,344 (0%) [72] 3 java/util/HashMap$Entry 0x86f2888c0
> 1)
> 38,777,480 (2%) [72] 2 java/util/HashMap$Entry 0x86f287580
> 38,777,408 (2%) [56] 2 guar/CUST/actions/BY23YDAction 0x836b94450
> 38,777,352 (2%) [88] 3 com/ibm/javart/v6/cso/CSOLocalPowerServerProxy
> 223,305,352 (16%) [240] 20 org/apache/struts/action/ActionServlet
> 136 (0%) [64] 1 java/lang/String 0x834ae86d8
> 11,773,272 (0%) [72] 3 java/util/HashMap$Entry 0x86f289110
> 2)
> 11,178,552 (0%) [72] 2 java/util/HashMap$Entry 0x86f2890d8
> 11,178,480 (0%) [56] 2 guar/CCHG_RC/actions/BQ04QRAction 0x8348c3958
> 144 (0%) [64] 1 java/lang/String 0x834c0ac68
> 594,648 (0%) [56] 2 guar/EXAM/actions/BH60JJAction 0x84117e7c8
> 136 (0%) [64] 1 java/lang/String 0x834be7298
> 3)
> 11,334,272 (0%) [72] 2 java/util/HashMap$Entry 0x86f288f88
> 11,334,200 (0%) [56] 2 guar/EXAM/actions/BG78HSAction 0x830a75a60
> 11,334,144 (0%) [88] 3 com/ibm/javart/v6/cso/CSOLocalPowerServerProxy
> 223,305,352 (16%) [240] 20 org/apache/struts/action/ActionServlet
> 136 (0%) [64] 1 java/lang/String 0x834a83df0
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