Shuyan Zhang created HADOOP-18726:
-------------------------------------
Summary: Set the locale to avoid printing useless logs.
Key: HADOOP-18726
URL: https://issues.apache.org/jira/browse/HADOOP-18726
Project: Hadoop Common
Issue Type: Improvement
Reporter: Shuyan Zhang
In our production environment, if the hadoop process is started in a
non-English environment, many unexpected error logs will be printed. The
following is the error message printed by datanode.
```
2023-05-01 09:10:50,299 ERROR
org.apache.hadoop.hdfs.server.datanode.FileIoProvider: error in op
transferToSocketFully : 断开的管道
2023-05-01 09:10:50,299 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode:
BlockSender.sendChunks() exception:
java.io.IOException: 断开的管道
at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
at
sun.nio.ch.FileChannelImpl.transferToDirectlyInternal(FileChannelImpl.java:428)
at
sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:493)
at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:608)
at
org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:242)
at
org.apache.hadoop.hdfs.server.datanode.FileIoProvider.transferToSocketFully(FileIoProvider.java:260)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendPacket(BlockSender.java:559)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.doSendBlock(BlockSender.java:801)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:755)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:580)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:116)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:71)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:258)
at java.lang.Thread.run(Thread.java:745)
2023-05-01 09:10:50,298 ERROR
org.apache.hadoop.hdfs.server.datanode.FileIoProvider: error in op
transferToSocketFully : 断开的管道
2023-05-01 09:10:50,298 ERROR
org.apache.hadoop.hdfs.server.datanode.FileIoProvider: error in op
transferToSocketFully : 断开的管道
2023-05-01 09:10:50,298 ERROR
org.apache.hadoop.hdfs.server.datanode.FileIoProvider: error in op
transferToSocketFully : 断开的管道
2023-05-01 09:10:50,298 ERROR
org.apache.hadoop.hdfs.server.datanode.FileIoProvider: error in op
transferToSocketFully : 断开的管道
2023-05-01 09:10:50,302 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode:
BlockSender.sendChunks() exception:
java.io.IOException: 断开的管道
at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
at
sun.nio.ch.FileChannelImpl.transferToDirectlyInternal(FileChannelImpl.java:428)
at
sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:493)
at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:608)
at
org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:242)
at
org.apache.hadoop.hdfs.server.datanode.FileIoProvider.transferToSocketFully(FileIoProvider.java:260)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendPacket(BlockSender.java:559)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.doSendBlock(BlockSender.java:801)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:755)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:580)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:116)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:71)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:258)
at java.lang.Thread.run(Thread.java:745)
2023-05-01 09:10:50,303 ERROR
org.apache.hadoop.hdfs.server.datanode.FileIoProvider: error in op
transferToSocketFully : 断开的管道
2023-05-01 09:10:50,303 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode:
BlockSender.sendChunks() exception:
java.io.IOException: 断开的管道
at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
at
sun.nio.ch.FileChannelImpl.transferToDirectlyInternal(FileChannelImpl.java:428)
at
sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:493)
at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:608)
at
org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:242)
at
org.apache.hadoop.hdfs.server.datanode.FileIoProvider.transferToSocketFully(FileIoProvider.java:260)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendPacket(BlockSender.java:568)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.doSendBlock(BlockSender.java:801)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:755)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:580)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:116)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:71)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:258)
at java.lang.Thread.run(Thread.java:745)
```
The reason for this situation is that the code uses the message of IOException
to determine whether to print Exception logs, but different locales will change
the content of the message.
This large number of error logs is very misleading, so this patch sets the
environment variable LANG in hadoop-env.sh.
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