Kai Sasaki created HADOOP-14418:
-----------------------------------
Summary: Confusing failure stack trace when codec fallback is
happend
Key: HADOOP-14418
URL: https://issues.apache.org/jira/browse/HADOOP-14418
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Kai Sasaki
Assignee: Kai Sasaki
Priority: Minor
When erasure codec is fallbacked, all stacktrace is shown to client.
{code}
root@990705591ccc:/usr/local/hadoop# bin/hadoop fs -put README.txt /ec
17/05/13 08:23:46 WARN util.NativeCodeLoader: Unable to load native-hadoop
library for your platform... using builtin-java classes where applicable
17/05/13 08:23:47 WARN erasurecode.CodecUtil: Failed to create raw erasure
encoder rs_native, fallback to next codec if possible
java.lang.ExceptionInInitializerError
at
org.apache.hadoop.io.erasurecode.rawcoder.NativeRSRawErasureCoderFactory.createEncoder(NativeRSRawErasureCoderFactory.java:35)
at
org.apache.hadoop.io.erasurecode.CodecUtil.createRawEncoderWithFallback(CodecUtil.java:173)
at
org.apache.hadoop.io.erasurecode.CodecUtil.createRawEncoder(CodecUtil.java:129)
at
org.apache.hadoop.hdfs.DFSStripedOutputStream.<init>(DFSStripedOutputStream.java:302)
at
org.apache.hadoop.hdfs.DFSOutputStream.newStreamForCreate(DFSOutputStream.java:309)
at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:1214)
at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:1193)
at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:1131)
at
org.apache.hadoop.hdfs.DistributedFileSystem$8.doCall(DistributedFileSystem.java:449)
at
org.apache.hadoop.hdfs.DistributedFileSystem$8.doCall(DistributedFileSystem.java:446)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:460)
at
org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:387)
at
org.apache.hadoop.fs.FilterFileSystem.create(FilterFileSystem.java:181)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1074)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1054)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:943)
at
org.apache.hadoop.fs.shell.CommandWithDestination$TargetFileSystem.create(CommandWithDestination.java:509)
at
org.apache.hadoop.fs.shell.CommandWithDestination$TargetFileSystem.writeStreamToFile(CommandWithDestination.java:484)
at
org.apache.hadoop.fs.shell.CommandWithDestination.copyStreamToTarget(CommandWithDestination.java:407)
at
org.apache.hadoop.fs.shell.CommandWithDestination.copyFileToTarget(CommandWithDestination.java:342)
at
org.apache.hadoop.fs.shell.CommandWithDestination.processPath(CommandWithDestination.java:277)
at
org.apache.hadoop.fs.shell.CommandWithDestination.processPath(CommandWithDestination.java:262)
at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:331)
at
org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:303)
at
org.apache.hadoop.fs.shell.CommandWithDestination.processPathArgument(CommandWithDestination.java:257)
at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:285)
at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:269)
at
org.apache.hadoop.fs.shell.CommandWithDestination.processArguments(CommandWithDestination.java:228)
at
org.apache.hadoop.fs.shell.CopyCommands$Put.processArguments(CopyCommands.java:286)
at
org.apache.hadoop.fs.shell.FsCommand.processRawArguments(FsCommand.java:119)
at org.apache.hadoop.fs.shell.Command.run(Command.java:176)
at org.apache.hadoop.fs.FsShell.run(FsShell.java:326)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
at org.apache.hadoop.fs.FsShell.main(FsShell.java:389)
Caused by: java.lang.RuntimeException: hadoop native library cannot be loaded.
at
org.apache.hadoop.io.erasurecode.ErasureCodeNative.checkNativeCodeLoaded(ErasureCodeNative.java:69)
at
org.apache.hadoop.io.erasurecode.rawcoder.NativeRSRawEncoder.<clinit>(NativeRSRawEncoder.java:33)
... 36 more
root@990705591ccc:/usr/local/hadoop#
{code}
It's confusing to users because it looks like writing ec file is failed. It is
useful to print only error message.
{code}
LOG.warn("Failed to create raw erasure encoder " + rawCoderName +
", fallback to next codec if possible", e);
{code}
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