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https://issues.apache.org/jira/browse/UIMA-4690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15000647#comment-15000647
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Lou DeGenaro commented on UIMA-4690:
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Hangs may occur whenever I/O processing is done improperly. The following may
be "non-compliant" according to
https://www.securecoding.cert.org/confluence/display/java/FIO07-J.+Do+not+let+external+processes+block+on+IO+buffers
uima-ducc-agent/src/main/java/org/apache/uima/ducc/agent/launcher/CGroupsManager.java
uima-ducc-agent/src/main/java/org/apache/uima/ducc/agent/processors/LinuxProcessMetricsProcessor.java
uima-ducc-cli/src/main/java/org/apache/uima/ducc/cli/aio/AllInOneLauncher.java
uima-ducc-common/src/main/java/org/apache/uima/ducc/common/agent/metrics/swap/DuccProcessMemoryPageLoadUsage.java
uima-ducc-common/src/main/java/org/apache/uima/ducc/common/crypto/Crypto.java
uima-ducc-common/src/main/java/org/apache/uima/ducc/common/utils/AlienFile.java
uima-ducc-orchestrator/src/main/java/org/apache/uima/ducc/orchestrator/user/DuccAsUser.java
uima-ducc-sm/src/main/java/org/apache/uima/ducc/sm/PingDriver.java
uima-ducc-sm/src/main/java/org/apache/uima/ducc/sm/ServiceInstance.java
uima-ducc-sm/src/main/java/org/apache/uima/ducc/sm/ServiceSet.java
uima-ducc-web/src/main/java/org/apache/uima/ducc/ws/authentication/DuccAsUser.java
uima-ducc-web/src/main/java/org/apache/uima/ducc/ws/server/AlienTextFile.java
> DUCC service manager hangs when starting a service that has no available
> resoures
> ---------------------------------------------------------------------------------
>
> Key: UIMA-4690
> URL: https://issues.apache.org/jira/browse/UIMA-4690
> Project: UIMA
> Issue Type: Bug
> Components: DUCC
> Reporter: Burn Lewis
> Assignee: Jim Challenger
> Fix For: 2.1.0-Ducc
>
>
> When the SM starts a service in a scheduling_class that has no available
> resources it appears to hang waiting for the resource. The WS gets no
> heartbeats and CLI requests such as query or unregister hang.
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