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https://issues.apache.org/jira/browse/HDFS-12367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Weiwei Yang resolved HDFS-12367.
--------------------------------
Resolution: Duplicate
I think this issue no longer happens to me, closing it as a dup to HDFS-12382
as this looks like to be fixed there, thanks [~nandakumar131]. [~msingh] feel
free to create another lower severity JIRA to track resource leaks you found in
code level. I will close this one as it is no longer a blocker for tests.
> Ozone: Too many open files error while running corona
> -----------------------------------------------------
>
> Key: HDFS-12367
> URL: https://issues.apache.org/jira/browse/HDFS-12367
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone, tools
> Reporter: Weiwei Yang
> Assignee: Mukul Kumar Singh
>
> Too many open files error keeps happening to me while using corona, I have
> simply setup a single node cluster and run corona to generate 1000 keys, but
> I keep getting following error
> {noformat}
> ./bin/hdfs corona -numOfThreads 1 -numOfVolumes 1 -numOfBuckets 1 -numOfKeys
> 1000
> 17/08/28 00:47:42 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> 17/08/28 00:47:42 INFO tools.Corona: Number of Threads: 1
> 17/08/28 00:47:42 INFO tools.Corona: Mode: offline
> 17/08/28 00:47:42 INFO tools.Corona: Number of Volumes: 1.
> 17/08/28 00:47:42 INFO tools.Corona: Number of Buckets per Volume: 1.
> 17/08/28 00:47:42 INFO tools.Corona: Number of Keys per Bucket: 1000.
> 17/08/28 00:47:42 INFO rpc.OzoneRpcClient: Creating Volume: vol-0-05000, with
> wwei as owner and quota set to 1152921504606846976 bytes.
> 17/08/28 00:47:42 INFO tools.Corona: Starting progress bar Thread.
> ...
> ERROR tools.Corona: Exception while adding key: key-251-19293 in bucket:
> bucket-0-34960 of volume: vol-0-05000.
> java.io.IOException: Exception getting XceiverClient.
> at
> org.apache.hadoop.scm.XceiverClientManager.getClient(XceiverClientManager.java:156)
> at
> org.apache.hadoop.scm.XceiverClientManager.acquireClient(XceiverClientManager.java:122)
> at
> org.apache.hadoop.ozone.client.io.ChunkGroupOutputStream.getFromKsmKeyInfo(ChunkGroupOutputStream.java:289)
> at
> org.apache.hadoop.ozone.client.rpc.OzoneRpcClient.createKey(OzoneRpcClient.java:487)
> at
> org.apache.hadoop.ozone.tools.Corona$OfflineProcessor.run(Corona.java:352)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: com.google.common.util.concurrent.UncheckedExecutionException:
> java.lang.IllegalStateException: failed to create a child event loop
> at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2234)
> at com.google.common.cache.LocalCache.get(LocalCache.java:3965)
> at
> com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4764)
> at
> org.apache.hadoop.scm.XceiverClientManager.getClient(XceiverClientManager.java:144)
> ... 9 more
> Caused by: java.lang.IllegalStateException: failed to create a child event
> loop
> at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
> at
> io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
> at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
> at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
> at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:44)
> at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:36)
> at org.apache.hadoop.scm.XceiverClient.connect(XceiverClient.java:76)
> at
> org.apache.hadoop.scm.XceiverClientManager$2.call(XceiverClientManager.java:151)
> at
> org.apache.hadoop.scm.XceiverClientManager$2.call(XceiverClientManager.java:145)
> at
> com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4767)
> at
> com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3568)
> at
> com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2350)
> at
> com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2313)
> at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2228)
> ... 12 more
> Caused by: io.netty.channel.ChannelException: failed to open a new selector
> at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
> at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
> at
> io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
> at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
> ... 25 more
> Caused by: java.io.IOException: Too many open files
> at sun.nio.ch.EPollArrayWrapper.epollCreate(Native Method)
> at sun.nio.ch.EPollArrayWrapper.<init>(EPollArrayWrapper.java:130)
> at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:69)
> at
> sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
> at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
> ... 28 more
> {noformat}
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