HDFS, mail # user - Re: Hadoop with S3 instead of local storage

Hadoop with S3 instead of local storage

Alok Kumar 2012-08-02, 07:14

Hi,

Followed instructions from this link for setup
http://wiki.apache.org/hadoop/AmazonS3.

my "core-site.xml " contains only these 3 properties :
<property>
  <name>fs.default.name</name>
  <value>s3://BUCKET</value>
</property>

<property>
  <name>fs.s3.awsAccessKeyId</name>
  <value>ID</value>
</property>

<property>
  <name>fs.s3.awsSecretAccessKey</name>
  <value>SECRET</value>
</property>

hdfs-site.xml is empty!

Namenode log says, its trying to connect to local HDFS not S3.
Am i missing anything?

Regards,
Alok

Re: Hadoop with S3 instead of local storage

Harsh J 2012-08-02, 11:52

With S3 you do not need a NameNode. NameNode is part of HDFS.

On Thu, Aug 2, 2012 at 12:44 PM, Alok Kumar <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Followed instructions from this link for setup
> http://wiki.apache.org/hadoop/AmazonS3.
>
> my "core-site.xml " contains only these 3 properties :
> <property>
> <name>fs.default.name</name>
> <value>s3://BUCKET</value>
> </property>
>
> <property>
> <name>fs.s3.awsAccessKeyId</name>
> <value>ID</value>
> </property>
>
> <property>
> <name>fs.s3.awsSecretAccessKey</name>
> <value>SECRET</value>
> </property>
>
> hdfs-site.xml is empty!
>
> Namenode log says, its trying to connect to local HDFS not S3.
> Am i missing anything?
>
> Regards,
> Alok

--
Harsh J

Re: Hadoop with S3 instead of local storage

Alok Kumar 2012-08-02, 13:01

Hi,

Thank you for reply.

Requirement is that I need to setup a hadoop cluster using s3 as a backup
(performance won't be an issue)

My Architecture is like :
Hive has external table mapped to HBase. HBase is storing data to HDFS.
Hive is using Hadoop to access HBase table data.
Can I make this work using S3?

HBase regionserver is failing with Error "Caused by:
java.lang.ClassNotFoundException: org.jets3t.service.S3ServiceException"

HBase master log has lots of "Unexpected response code 404, expected 200"

Do I need to start DataNode with s3?
Datanode log says :

2012-08-02 17:50:20,021 INFO
org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting DataNode
STARTUP_MSG: host = datarpm-desktop/192.168.2.4
STARTUP_MSG: args = []
STARTUP_MSG: version = 1.0.1
STARTUP_MSG: build https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0 -r
1243785; compiled by 'hortonfo' on Tue Feb 14 08:15:38 UTC 2012
************************************************************/
2012-08-02 17:50:20,145 INFO org.apache.hadoop.metrics2.impl.MetricsConfig:
loaded properties from hadoop-metrics2.properties
2012-08-02 17:50:20,156 INFO
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source
MetricsSystem,sub=Stats registered.
2012-08-02 17:50:20,157 INFO
org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot
period at 10 second(s).
2012-08-02 17:50:20,157 INFO
org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system
started
2012-08-02 17:50:20,277 INFO
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi
registered.
2012-08-02 17:50:20,281 WARN
org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already
exists!
2012-08-02 17:50:20,317 INFO org.apache.hadoop.util.NativeCodeLoader:
Loaded the native-hadoop library
2012-08-02 17:50:22,006 ERROR
org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Call
to <bucket-name>/67.215.65.132:8020 failed on local exception:
java.io.EOFException
   at org.apache.hadoop.ipc.Client.wrapException(Client.java:1103)
   at org.apache.hadoop.ipc.Client.call(Client.java:1071)
   at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
   at $Proxy5.getProtocolVersion(Unknown Source)
   at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
   at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:370)
   at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:429)
   at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:331)
   at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:296)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:356)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:299)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1582)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1521)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1539)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1665)
   at
org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1682)
Caused by: java.io.EOFException
   at java.io.DataInputStream.readInt(DataInputStream.java:375)
   at
org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:800)
   at org.apache.hadoop.ipc.Client$Connection.run(Client.java:745)

2012-08-02 17:50:22,007 INFO
org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at datarpm-desktop/192.168.2.4
Thanks,

On Thu, Aug 2, 2012 at 5:22 PM, Harsh J <[EMAIL PROTECTED]> wrote:

> With S3 you do not need a NameNode. NameNode is part of HDFS.
>
> On Thu, Aug 2, 2012 at 12:44 PM, Alok Kumar <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > Followed instructions from this link for setup
> > http://wiki.apache.org/hadoop/AmazonS3.

Alok

Re: Hadoop with S3 instead of local storage

Harsh J 2012-08-02, 17:48

Alok,

HDFS is a FileSystem. S3 is also a FileSystem. Hence when you choose
to use S3 on a node, do not attempt to start HDFS services such as
NameNode and DataNode. They have nothing to do with S3. S3 stands
alone and its configuration points to where it is running / how it is
to be accessed / etc.. For S3 to be available, the S3's jars should be
made available in services you wish to use it in.

Yes you can make Hive/HBase work with S3, if S3 is configured as the
fs.default.name (or fs.defaultFS in 2.x+). You can configure your
core-site.xml with the right FS, and run regular "hadoop fs -ls /",
etc. commands against that FS. The library is jets3t:
http://jets3t.s3.amazonaws.com/downloads.html and you'll need its jar
on HBase/Hive/etc. classpaths.

Let us know if this clears it up!

On Thu, Aug 2, 2012 at 6:31 PM, Alok Kumar <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Thank you for reply.
>
> Requirement is that I need to setup a hadoop cluster using s3 as a backup
> (performance won't be an issue)
>
> My Architecture is like :
> Hive has external table mapped to HBase. HBase is storing data to HDFS.
> Hive is using Hadoop to access HBase table data.
> Can I make this work using S3?
>
> HBase regionserver is failing with Error "Caused by:
> java.lang.ClassNotFoundException: org.jets3t.service.S3ServiceException"
>
> HBase master log has lots of "Unexpected response code 404, expected 200"
>
> Do I need to start DataNode with s3?
> Datanode log says :
>
> 2012-08-02 17:50:20,021 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
> /************************************************************
> STARTUP_MSG: Starting DataNode
> STARTUP_MSG: host = datarpm-desktop/192.168.2.4
> STARTUP_MSG: args = []
> STARTUP_MSG: version = 1.0.1
> STARTUP_MSG: build > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0 -r
> 1243785; compiled by 'hortonfo' on Tue Feb 14 08:15:38 UTC 2012
> ************************************************************/
> 2012-08-02 17:50:20,145 INFO org.apache.hadoop.metrics2.impl.MetricsConfig:
> loaded properties from hadoop-metrics2.properties
> 2012-08-02 17:50:20,156 INFO
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source
> MetricsSystem,sub=Stats registered.
> 2012-08-02 17:50:20,157 INFO
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period
> at 10 second(s).
> 2012-08-02 17:50:20,157 INFO
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system
> started
> 2012-08-02 17:50:20,277 INFO
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi
> registered.
> 2012-08-02 17:50:20,281 WARN
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already
> exists!
> 2012-08-02 17:50:20,317 INFO org.apache.hadoop.util.NativeCodeLoader: Loaded
> the native-hadoop library
> 2012-08-02 17:50:22,006 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Call
> to <bucket-name>/67.215.65.132:8020 failed on local exception:
> java.io.EOFException
> at org.apache.hadoop.ipc.Client.wrapException(Client.java:1103)
> at org.apache.hadoop.ipc.Client.call(Client.java:1071)
> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
> at $Proxy5.getProtocolVersion(Unknown Source)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:370)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:429)
> at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:331)
> at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:296)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:356)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:299)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1582)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1521)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1539)

Harsh J

Re: Hadoop with S3 instead of local storage

Alok Kumar 2012-08-03, 07:26

Thank you Harsh.
That clears my doubt for Hadoop with S3.

Q. Does HBase communicate with S3 directly without using Hadoop?

I've put this task aside for a while..! ..will post again.
I've not make it working yet. "jets3t jar" is present in classpath.

Thanks,
Alok
HMaster is running ..

Regionserver log :

2012-08-03 12:42:40,576 WARN
org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
'/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Unexpected response
code 404, expected 200
2012-08-03 12:42:40,576 WARN
org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
'/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Received error
response with XML message
2012-08-03 12:42:43,063 WARN
org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
'/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Unexpected response
code 404, expected 200
2012-08-03 12:42:43,063 WARN
org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
'/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Received error
response with XML message
2012-08-03 12:42:43,831 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
HLog configuration: blocksize=32 MB, rollsize=30.4 MB, enabled=true,
optionallogflushinternal=1000ms
2012-08-03 12:42:43,840 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Failed
initialization
2012-08-03 12:42:43,842 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServer: Failed init
java.io.IOException: cannot get log writer
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.createWriter(HLog.java:678)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.createWriterInstance(HLog.java:625)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:557)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:517)
   at org.apache.hadoop.hbase.regionserver.wal.HLog.<init>(HLog.java:405)
   at org.apache.hadoop.hbase.regionserver.wal.HLog.<init>(HLog.java:331)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.instantiateHLog(HRegionServer.java:1215)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.setupWALAndReplication(HRegionServer.java:1204)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.handleReportForDutyResponse(HRegionServer.java:923)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:639)
   at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: java.io.IOException: createNonRecursive
unsupported for this filesystem class org.apache.hadoop.fs.s3.S3FileSystem
   at
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:106)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.createWriter(HLog.java:675)
   ... 10 more
Caused by: java.io.IOException: createNonRecursive unsupported for this
filesystem class org.apache.hadoop.fs.s3.S3FileSystem
   at
org.apache.hadoop.fs.FileSystem.createNonRecursive(FileSystem.java:626)
   at
org.apache.hadoop.fs.FileSystem.createNonRecursive(FileSystem.java:601)
   at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:442)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:87)
   ... 11 more
2012-08-03 12:42:43,847 FATAL
org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server
slave-1,60020,1343977957962: Unhandled exception: cannot get log writer
java.io.IOException: cannot get log writer
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.createWriter(HLog.java:678)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.createWriterInstance(HLog.java:625)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:557)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:517)
   at org.apache.hadoop.hbase.regionserver.wal.HLog.<init>(HLog.java:405)
   at org.apache.hadoop.hbase.regionserver.wal.HLog.<init>(HLog.java:331)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.instantiateHLog(HRegionServer.java:1215)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.setupWALAndReplication(HRegionServer.java:1204)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.handleReportForDutyResponse(HRegionServer.java:923)
   at
org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:639)
   at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: java.io.IOException: createNonRecursive
unsupported for this filesystem class org.apache.hadoop.fs.s3.S3FileSystem
   at
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:106)
   at
org.apache.hadoop.hbase.regionserver.wal.HLog.createWriter(HLog.java:675)
   ... 10 more
Caused by: java.io.IOException: createNonRecursive unsupported for this
filesystem class org.apache.hadoop.fs.s3.S3FileSystem
   at
org.apache.hadoop.fs.FileSystem.createNonRecursive(FileSystem.java:626)
   at
org.apache.hadoop.fs.FileSystem.createNonRecursive(FileSystem.java:601)
   at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:442)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:87)
   ... 11 more
2012-08-03 12:42:43,848 FATAL
org.apache.hadoop.hbase.regionserver.HRegionServer: RegionServer abort:
loaded coprocessors are: []
2012-08-03 12:42:43,850 INFO
or

Re: Hadoop with S3 instead of local storage

Harsh J 2012-08-03, 07:30

Alok,

Caused by: java.io.IOException: createNonRecursive unsupported for
this filesystem class org.apache.hadoop.fs.s3.S3FileSystem

This seems like a limitation imposed by HBase. Can you ask your
question at [EMAIL PROTECTED] for the right people to answer you
back? Also, can you run HBase in standalone mode (no RSes)? I believe
thats how it may work on S3?

On Fri, Aug 3, 2012 at 12:56 PM, Alok Kumar <[EMAIL PROTECTED]> wrote:
> Thank you Harsh.
> That clears my doubt for Hadoop with S3.
>
> Q. Does HBase communicate with S3 directly without using Hadoop?
>
> I've put this task aside for a while..! ..will post again.
> I've not make it working yet. "jets3t jar" is present in classpath.
>
> Thanks,
> Alok
>
>
> HMaster is running ..
>
> Regionserver log :
>
> 2012-08-03 12:42:40,576 WARN
> org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
> '/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Unexpected response
> code 404, expected 200
> 2012-08-03 12:42:40,576 WARN
> org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
> '/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Received error
> response with XML message
> 2012-08-03 12:42:43,063 WARN
> org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
> '/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Unexpected response
> code 404, expected 200
> 2012-08-03 12:42:43,063 WARN
> org.jets3t.service.impl.rest.httpclient.RestS3Service: Response
> '/%2Fhbase%2F.logs%2Fslave-1%2C60020%2C1343977957962' - Received error
> response with XML message
> 2012-08-03 12:42:43,831 INFO org.apache.hadoop.hbase.regionserver.wal.HLog:
> HLog configuration: blocksize=32 MB, rollsize=30.4 MB, enabled=true,
> optionallogflushinternal=1000ms
> 2012-08-03 12:42:43,840 INFO
> org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Failed
> initialization
> 2012-08-03 12:42:43,842 ERROR
> org.apache.hadoop.hbase.regionserver.HRegionServer: Failed init
> java.io.IOException: cannot get log writer
> at
> org.apache.hadoop.hbase.regionserver.wal.HLog.createWriter(HLog.java:678)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLog.createWriterInstance(HLog.java:625)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:557)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:517)
> at org.apache.hadoop.hbase.regionserver.wal.HLog.<init>(HLog.java:405)
> at org.apache.hadoop.hbase.regionserver.wal.HLog.<init>(HLog.java:331)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.instantiateHLog(HRegionServer.java:1215)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.setupWALAndReplication(HRegionServer.java:1204)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.handleReportForDutyResponse(HRegionServer.java:923)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:639)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: java.io.IOException: java.io.IOException: createNonRecursive
> unsupported for this filesystem class org.apache.hadoop.fs.s3.S3FileSystem
> at
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.init(SequenceFileLogWriter.java:106)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLog.createWriter(HLog.java:675)
> ... 10 more
> Caused by: java.io.IOException: createNonRecursive unsupported for this
> filesystem class org.apache.hadoop.fs.s3.S3FileSystem
> at
> org.apache.hadoop.fs.FileSystem.createNonRecursive(FileSystem.java:626)
> at
> org.apache.hadoop.fs.FileSystem.createNonRecursive(FileSystem.java:601)
> at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:442)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)

Harsh J