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Weiwei Yang commented on HDFS-12367: ------------------------------------ Looks like there are some resource leaks? :P > 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 > > 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} -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org