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From Su She <suhsheka...@gmail.com>
Subject HDFS Rest Service not available
Date Mon, 01 Jun 2015 23:33:48 GMT
Hello All,

A bit scared I did something stupid...I killed a few PIDs that were
listening to ports 2183 (kafka), 4042 (spark app), some of the PIDs
didn't even seem to be stopped as they still are running when i do

lsof -i:[port number]

I'm not sure if the problem started after or before I did these kill
commands, but I now can't connect to HDFS or start spark. I can't seem
to access Hue. I am afraid I accidentally killed an important process
related to HDFS. But, I am not sure what it would be as I couldn't
even kill the PIDs.

Is it a coincidence that HDFS failed randomly? Likely that I killed an
important PID? How can I maybe restart HDFS?

Thanks a lot!

Error on Hue:

Cannot access: /user/ec2-user. The HDFS REST service is not available.
Note: You are a Hue admin but not a HDFS superuser (which is "hdfs").

HTTPConnectionPool(host='ec2-ip-address.us-west-1.compute.amazonaws.com',
port=50070): Max retries exceeded with url:
/webhdfs/v1/user/ec2-user?op=GETFILESTATUS&user.name=hue&doas=ec2-user
(Caused by <class 'socket.error'>: [Errno 111] Connection refused)

Error when I try to open spark-shell or a spark app:
java.net.ConnectException: Call From
ip-10-0-2-216.us-west-1.compute.internal/10.0.2.216 to
ip-10-0-2-216.us-west-1.compute.internal:8020 failed on connection
exception: java.net.ConnectException: Connection refused; For more
details see:  http://wiki.apache.org/hadoop/ConnectionRefused
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:783)
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:730)
        at org.apache.hadoop.ipc.Client.call(Client.java:1415)
        at org.apache.hadoop.ipc.Client.call(Client.java:1364)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
        at com.sun.proxy.$Proxy20.getFileInfo(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:744)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy21.getFileInfo(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1921)
        at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1089)
        at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1085)
        at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1085)
        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1400)
        at org.apache.spark.util.FileLogger.createLogDir(FileLogger.scala:123)
        at org.apache.spark.util.FileLogger.start(FileLogger.scala:115)
        at org.apache.spark.scheduler.EventLoggingListener.start(EventLoggingListener.scala:74)
        at org.apache.spark.SparkContext.<init>(SparkContext.scala:353)
        at org.apache.spark.repl.SparkILoop.createSparkContext(SparkILoop.scala:986)
        at $iwC$$iwC.<init>(<console>:9)
        at $iwC.<init>(<console>:18)
        at <init>(<console>:20)
        at .<init>(<console>:24)
        at .<clinit>(<console>)
        at .<init>(<console>:7)
        at .<clinit>(<console>)
        at $print(<console>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:852)
        at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1125)
        at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:674)
        at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:705)
        at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:669)
        at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:828)
        at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:873)
        at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:785)
        at org.apache.spark.repl.SparkILoopInit$$anonfun$initializeSpark$1.apply(SparkILoopInit.scala:123)
        at org.apache.spark.repl.SparkILoopInit$$anonfun$initializeSpark$1.apply(SparkILoopInit.scala:122)
        at org.apache.spark.repl.SparkIMain.beQuietDuring(SparkIMain.scala:270)
        at org.apache.spark.repl.SparkILoopInit$class.initializeSpark(SparkILoopInit.scala:122)
        at org.apache.spark.repl.SparkILoop.initializeSpark(SparkILoop.scala:60)
        at org.apache.spark.repl.SparkILoop$$anonfun$process$1$$anonfun$apply$mcZ$sp$5.apply$mcV$sp(SparkILoop.scala:945)
        at org.apache.spark.repl.SparkILoopInit$class.runThunks(SparkILoopInit.scala:147)
        at org.apache.spark.repl.SparkILoop.runThunks(SparkILoop.scala:60)
        at org.apache.spark.repl.SparkILoopInit$class.postInitialization(SparkILoopInit.scala:106)
        at org.apache.spark.repl.SparkILoop.postInitialization(SparkILoop.scala:60)
        at org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply$mcZ$sp(SparkILoop.scala:962)
        at org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply(SparkILoop.scala:916)
        at org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply(SparkILoop.scala:916)
        at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
        at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:916)
        at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:1011)
        at org.apache.spark.repl.Main$.main(Main.scala:31)
        at org.apache.spark.repl.Main.main(Main.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:358)
        at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:75)
        at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.net.ConnectException: Connection refused
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
        at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
        at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:606)
        at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:700)
        at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)
        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1463)
        at org.apache.hadoop.ipc.Client.call(Client.java:1382)
        ... 67 more

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