Support Article
Hung Threads during ADM startup
Summary
Starting the Adaptive Decision Manager (ADM) server is time consuming and is error prone.
There are 2194 rows in the FACTORIES table in the pre-production environment.
Error Messages
18/07/16 16:31:31:797 BST] 000000c0 ThreadMonitor W WSVR0605W: Thread "server.startup : 1" (000000a0) has been active for 696061 milliseconds and may be hung. There is/are 1 thread(s) in total in the server that may be hung.
at org.yaml.snakeyaml.nodes.Node.useClassConstructor(Node.java:139)
at org.yaml.snakeyaml.constructor.BaseConstructor.getConstructor(BaseConstructor.java:201)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:181)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequenceStep2(BaseConstructor.java:275)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequence(BaseConstructor.java:246)
at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlSeq.construct(SafeConstructor.java:442)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:373)
at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:145)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:354)
at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:461)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequenceStep2(BaseConstructor.java:275)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequence(BaseConstructor.java:246)
at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlSeq.construct(SafeConstructor.java:442)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:373)
at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:145)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:354)
at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:461)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:373)
at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:145)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:354)
at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:461)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:141)
at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:127)
at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481)
at org.yaml.snakeyaml.Yaml.load(Yaml.java:400)
at com.pega.decision.common.serialization.yaml.YAMLSerializationSource.<init>(YAMLSerializationSource.java:54)
at com.pega.decision.common.serialization.yaml.YAMLSerializationSource.newInstance(YAMLSerializationSource.java:39)
at com.pega.decision.adm.server.ObjectSerializer.getSerializationSource(ObjectSerializer.java:48)
<more...>
Steps to Reproduce
Restart ADM server having large number of ADM model.
Root Cause
A defect in Pegasystems’ code or rules during ADM server startup, performance issue when reading ADM artefacts as blobs and processing them.
Resolution
Apply HFix-28701.
Note that there are special instructions on applying this hotfix. Read the additional instructions in the hotfix package.
Published August 3, 2016 - Updated October 8, 2020
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