Weiwei Yang created HDFS-12367:
----------------------------------
Summary: 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}
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