[jira] [Resolved] (HDDS-3594) ManagedChannels are leaked in XceiverClientGrpc manager

["Rakesh Radhakrishnan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-3594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rakesh Radhakrishnan resolved HDDS-3594.
----------------------------------------
    Resolution: Duplicate

[~jnp] yes you are correct, this has similarities with HDDS-3600. The initial set of exception trace pointing to "{{Make sure to call shutdown()/shutdownNow() and wait until awaitTermination() returns true}}", which is same as the exception described in this jira.

I'm marking as duplicate and based on detailed analysis of HDDS-3600, will re-open if requires.

> ManagedChannels are leaked in XceiverClientGrpc manager
> -------------------------------------------------------
>
>                 Key: HDDS-3594
>                 URL: https://issues.apache.org/jira/browse/HDDS-3594
>             Project: Hadoop Distributed Data Store
>          Issue Type: Bug
>          Components: Ozone Client
>    Affects Versions: 0.6.0
>            Reporter: Rakesh Radhakrishnan
>            Priority: Major
>              Labels: TriagePending
>
> XceiverClientGrpc#ManagedChannels are leaked when running {{Hadoop Synthetic Load Generator}} pointing to OzoneFS.
> *Stacktrace:*
> {code:java}
> SEVERE: *~*~*~ Channel ManagedChannelImpl{logId=99, target=10.17.248.31:9859} was not shutdown properly!!! ~*~*~*
>     Make sure to call shutdown()/shutdownNow() and wait until awaitTermination() returns true.
> java.lang.RuntimeException: ManagedChannel allocation site
>         at org.apache.ratis.thirdparty.io.grpc.internal.ManagedChannelOrphanWrapper$ManagedChannelReference.<init>(ManagedChannelOrphanWrapper.java:94)
>         at org.apache.ratis.thirdparty.io.grpc.internal.ManagedChannelOrphanWrapper.<init>(ManagedChannelOrphanWrapper.java:52)
>         at org.apache.ratis.thirdparty.io.grpc.internal.ManagedChannelOrphanWrapper.<init>(ManagedChannelOrphanWrapper.java:43)
>         at org.apache.ratis.thirdparty.io.grpc.internal.AbstractManagedChannelImplBuilder.build(AbstractManagedChannelImplBuilder.java:518)
>         at org.apache.hadoop.hdds.scm.XceiverClientGrpc.connectToDatanode(XceiverClientGrpc.java:191)
>         at org.apache.hadoop.hdds.scm.XceiverClientGrpc.connect(XceiverClientGrpc.java:140)
>         at org.apache.hadoop.hdds.scm.XceiverClientManager$2.call(XceiverClientManager.java:244)
>         at org.apache.hadoop.hdds.scm.XceiverClientManager$2.call(XceiverClientManager.java:228)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4876)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3529)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2278)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2155)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2045)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache.get(LocalCache.java:3951)
>         at org.apache.hadoop.ozone.shaded.com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4871)
>         at org.apache.hadoop.hdds.scm.XceiverClientManager.getClient(XceiverClientManager.java:228)
>         at org.apache.hadoop.hdds.scm.XceiverClientManager.acquireClient(XceiverClientManager.java:174)
>         at org.apache.hadoop.hdds.scm.XceiverClientManager.acquireClientForReadData(XceiverClientManager.java:164)
>         at org.apache.hadoop.hdds.scm.storage.BlockInputStream.getChunkInfos(BlockInputStream.java:184)
>         at org.apache.hadoop.hdds.scm.storage.BlockInputStream.initialize(BlockInputStream.java:133)
>         at org.apache.hadoop.hdds.scm.storage.BlockInputStream.read(BlockInputStream.java:254)
>         at org.apache.hadoop.ozone.client.io.KeyInputStream.read(KeyInputStream.java:199)
>         at org.apache.hadoop.fs.ozone.OzoneFSInputStream.read(OzoneFSInputStream.java:63)
>         at java.io.DataInputStream.read(DataInputStream.java:100)
>         at org.apache.hadoop.fs.loadGenerator.LoadGenerator$DFSClientThread.read(LoadGenerator.java:284)
>         at org.apache.hadoop.fs.loadGenerator.LoadGenerator$DFSClientThread.nextOp(LoadGenerator.java:268)
>         at org.apache.hadoop.fs.loadGenerator.LoadGenerator$DFSClientThread.run(LoadGenerator.java:235)
> {code}



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