Rod created HDFS-8162:
-------------------------
Summary: Stack trace routed to standard out
Key: HDFS-8162
URL: https://issues.apache.org/jira/browse/HDFS-8162
Project: Hadoop HDFS
Issue Type: Improvement
Components: libhdfs
Affects Versions: 2.5.2
Reporter: Rod
Priority: Minor
Calling hdfsOpenFile() can generate a stacktrace printout to standard out,
which can be problematic for caller program which is making use of standard
out. libhdfs stacktraces should be routed to standard error.
Example of stacktrace:
WARN [main] hdfs.BlockReaderFactory
(BlockReaderFactory.java:getRemoteBlockReaderFromTcp(693)) - I/O error
constructing remote block reader.
org.apache.hadoop.net.ConnectTimeoutException: 60000 millis timeout while
waiting for channel to be ready for connect. ch :
java.nio.channels.SocketChannel[connection-pending remote=/x.x.x.10:50010]
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:533)
at
org.apache.hadoop.hdfs.DFSClient.newConnectedPeer(DFSClient.java:3101)
at
org.apache.hadoop.hdfs.BlockReaderFactory.nextTcpPeer(BlockReaderFactory.java:755)
at
org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReaderFromTcp(BlockReaderFactory.java:670)
at
org.apache.hadoop.hdfs.BlockReaderFactory.build(BlockReaderFactory.java:337)
at
org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:576)
at
org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:800)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:854)
at
org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:143)
2015-04-16 10:32:13,946 WARN [main] hdfs.DFSClient
(DFSInputStream.java:blockSeekTo(612)) - Failed to connect to /x.x.x.10:50010
for block, add to deadNodes and continue.
org.apache.hadoop.net.ConnectTimeoutException: 60000 millis timeout while
waiting for channel to be ready for connect. ch :
java.nio.channels.SocketChannel[connection-pending remote=/x.x.x.10:50010]
org.apache.hadoop.net.ConnectTimeoutException: 60000 millis timeout while
waiting for channel to be ready for connect. ch :
java.nio.channels.SocketChannel[connection-pending remote=/x.x.x.10:50010]
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:533)
at
org.apache.hadoop.hdfs.DFSClient.newConnectedPeer(DFSClient.java:3101)
at
org.apache.hadoop.hdfs.BlockReaderFactory.nextTcpPeer(BlockReaderFactory.java:755)
at
org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReaderFromTcp(BlockReaderFactory.java:670)
at
org.apache.hadoop.hdfs.BlockReaderFactory.build(BlockReaderFactory.java:337)
at
org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:576)
at
org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:800)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:854)
at
org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:143)
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