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https://issues.apache.org/jira/browse/HDFS-7818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14330354#comment-14330354
]
Eric Payne commented on HDFS-7818:
----------------------------------
The stacktrace from the DN log is
2015-02-21 17:19:19,901 [nioEventLoopGroup-3-2] WARN webhdfs.WebHdfsHandler:
INTERNAL_SERVER_ERROR
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.datanode.web.webhdfs.ParameterParser.offset(ParameterParser.java:76)
at
org.apache.hadoop.hdfs.server.datanode.web.webhdfs.WebHdfsHandler.onOpen(WebHdfsHandler.java:190)
at
org.apache.hadoop.hdfs.server.datanode.web.webhdfs.WebHdfsHandler.handle(WebHdfsHandler.java:129)
at
org.apache.hadoop.hdfs.server.datanode.web.webhdfs.WebHdfsHandler$1.run(WebHdfsHandler.java:111)
at
org.apache.hadoop.hdfs.server.datanode.web.webhdfs.WebHdfsHandler$1.run(WebHdfsHandler.java:108)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1680)
at
org.apache.hadoop.hdfs.server.datanode.web.webhdfs.WebHdfsHandler.channelRead0(WebHdfsHandler.java:108)
at
org.apache.hadoop.hdfs.server.datanode.web.URLDispatcher.channelRead0(URLDispatcher.java:52)
at
org.apache.hadoop.hdfs.server.datanode.web.URLDispatcher.channelRead0(URLDispatcher.java:32)
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at
io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at
io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
at java.lang.Thread.run(Thread.java:745)
> FsShell -text over webhdfs fails with NPE in DN
> -----------------------------------------------
>
> Key: HDFS-7818
> URL: https://issues.apache.org/jira/browse/HDFS-7818
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: webhdfs
> Affects Versions: 2.7.0
> Reporter: Eric Payne
> Assignee: Eric Payne
>
> This is a regression in 2.7 and later.
> {{hadoop fs -cat}} over webhdfs works, but {{hadoop fs -text}} does not:
> {code}
> $ hadoop fs -cat webhdfs://myhost.com/tmp/test.1
> ... output ...
> $ hadoop fs -text webhdfs://myhost.com/tmp/test.1
> text: org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException):
> null
> at
> org.apache.hadoop.hdfs.web.JsonUtil.toRemoteException(JsonUtil.java:165)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:358)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.access$200(WebHdfsFileSystem.java:91)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.runWithRetry(WebHdfsFileSystem.java:615)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.access$100(WebHdfsFileSystem.java:463)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner$1.run(WebHdfsFileSystem.java:492)
> ...
> {code}
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