Output File could only be replicated to 0 nodes

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Output File could only be replicated to 0 nodes

Madhav Sharan
Hi hadoop users,

We are running a mapreduce jobs with 10 nodes. Each  map job process a video and generate a .txt file as output. We are getting DataStreamer Exception that File could only be replicated to 0 nodes instead of minReplication (=1). This is the output file we expect after successful run. 

Any help is appreciated. We checked hdfs has space available and all nodes are responding.

Full trace - 

2016-07-24 21:55:08,343 WARN [Thread-214] org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

        at org.apache.hadoop.ipc.Client.call(Client.java:1475)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy12.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        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:191)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy13.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1459)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1255)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)

--
Madhav Sharan

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Re: Output File could only be replicated to 0 nodes

gabriel balan


Hi

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.

Can it be there is no more space left (for HDFS) on the host running data nodes?

Try running "hdfs dfsadmin -report"

hth

Gabriel Balan


On 7/24/2016 7:53 PM, Madhav Sharan wrote:
Hi hadoop users,

We are running a mapreduce jobs with 10 nodes. Each  map job process a video and generate a .txt file as output. We are getting DataStreamer Exception that File could only be replicated to 0 nodes instead of minReplication (=1). This is the output file we expect after successful run. 

Any help is appreciated. We checked hdfs has space available and all nodes are responding.

Full trace - 

2016-07-24 21:55:08,343 WARN [Thread-214] org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

        at org.apache.hadoop.ipc.Client.call(Client.java:1475)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy12.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        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:191)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy13.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1459)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1255)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)

--
Madhav Sharan


-- 
The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation.
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Re: Output File could only be replicated to 0 nodes

Gagan Brahmi
There can be several reasons you see this error.

The most common ones are:

Disk Space on Datanodes - Like mentioned earlier in the thread.
Inconsistent DataNodes - You can try to restart HDFS which should clean it up.
Bad or Unresponsive Datanode
Negative 'Block Size' in hdfs-site.xml.
Network communication issues.


Regards,
Gagan Brahmi

On Mon, Jul 25, 2016 at 9:14 AM, Gabriel Balan <[hidden email]> wrote:


Hi

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.

Can it be there is no more space left (for HDFS) on the host running data nodes?

Try running "hdfs dfsadmin -report"

hth

Gabriel Balan


On 7/24/2016 7:53 PM, Madhav Sharan wrote:
Hi hadoop users,

We are running a mapreduce jobs with 10 nodes. Each  map job process a video and generate a .txt file as output. We are getting DataStreamer Exception that File could only be replicated to 0 nodes instead of minReplication (=1). This is the output file we expect after successful run. 

Any help is appreciated. We checked hdfs has space available and all nodes are responding.

Full trace - 

2016-07-24 21:55:08,343 WARN [Thread-214] org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

        at org.apache.hadoop.ipc.Client.call(Client.java:1475)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy12.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        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:191)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy13.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1459)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1255)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)

--
Madhav Sharan


-- 
The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation.

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Re: Output File could only be replicated to 0 nodes

Madhav Sharan
Thanks everyone for help. I believe the error was coming because of increase in Non DFS memory usage. 

Decommission Status : Normal
Configured Capacity: 74033672192 (68.95 GB)
DFS Used: 6814511104 (6.35 GB)
Non DFS Used: 4128133120 (3.84 GB)
DFS Remaining: 63091027968 (58.76 GB)
DFS Used%: 9.20%
DFS Remaining%: 85.22%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 1



Decommission Status : Normal
Configured Capacity: 74033672192 (68.95 GB)
DFS Used: 7336382464 (6.83 GB)
Non DFS Used: 60541867008 (56.38 GB)
DFS Remaining: 6155422720 (5.73 GB)
DFS Used%: 9.91%
DFS Remaining%: 8.31%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 847


--
Madhav Sharan


On Mon, Jul 25, 2016 at 10:00 AM, Gagan Brahmi <[hidden email]> wrote:
There can be several reasons you see this error.

The most common ones are:

Disk Space on Datanodes - Like mentioned earlier in the thread.
Inconsistent DataNodes - You can try to restart HDFS which should clean it up.
Bad or Unresponsive Datanode
Negative 'Block Size' in hdfs-site.xml.
Network communication issues.


Regards,
Gagan Brahmi

On Mon, Jul 25, 2016 at 9:14 AM, Gabriel Balan <[hidden email]> wrote:


Hi

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.

Can it be there is no more space left (for HDFS) on the host running data nodes?

Try running "hdfs dfsadmin -report"

hth

Gabriel Balan


On 7/24/2016 7:53 PM, Madhav Sharan wrote:
Hi hadoop users,

We are running a mapreduce jobs with 10 nodes. Each  map job process a video and generate a .txt file as output. We are getting DataStreamer Exception that File could only be replicated to 0 nodes instead of minReplication (=1). This is the output file we expect after successful run. 

Any help is appreciated. We checked hdfs has space available and all nodes are responding.

Full trace - 

2016-07-24 21:55:08,343 WARN [Thread-214] org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

        at org.apache.hadoop.ipc.Client.call(Client.java:1475)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy12.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        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:191)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy13.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1459)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1255)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)

--
Madhav Sharan


-- 
The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation.


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Re: Output File could only be replicated to 0 nodes

권병창

 

dfs.namenode.replication.considerLoadtrueDecide if chooseTarget considers the target's load or not

 

there are wide variation in Xceivers of below datanode.  

try  dfs.namenode.replication.considerLoad=false 

 

 

-----Original Message-----
From: "Madhav Sharan"<[hidden email]>
To: "Gagan Brahmi"<[hidden email]>;
Cc: "Gabriel Balan"<[hidden email]>; "user"<[hidden email]>; <[hidden email]>;
Sent: 2016-08-01 (월) 15:57:35
Subject: Re: Output File could only be replicated to 0 nodes
 

Thanks everyone for help. I believe the error was coming because of increase in Non DFS memory usage. 

Decommission Status : Normal
Configured Capacity: 74033672192 (68.95 GB)
DFS Used: 6814511104 (6.35 GB)
Non DFS Used: 4128133120 (3.84 GB)
DFS Remaining: 63091027968 (58.76 GB)
DFS Used%: 9.20%
DFS Remaining%: 85.22%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 1
 
 
 
Decommission Status : Normal
Configured Capacity: 74033672192 (68.95 GB)
DFS Used: 7336382464 (6.83 GB)
Non DFS Used: 60541867008 (56.38 GB)
DFS Remaining: 6155422720 (5.73 GB)
DFS Used%: 9.91%
DFS Remaining%: 8.31%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Xceivers: 847
 

--
Madhav Sharan 
 

On Mon, Jul 25, 2016 at 10:00 AM, Gagan Brahmi <[hidden email]> wrote:
There can be several reasons you see this error.
 
The most common ones are:
 
Disk Space on Datanodes - Like mentioned earlier in the thread.
Inconsistent DataNodes - You can try to restart HDFS which should clean it up.
Bad or Unresponsive Datanode
Negative 'Block Size' in hdfs-site.xml.
Network communication issues.
 
 
Regards,
Gagan Brahmi

On Mon, Jul 25, 2016 at 9:14 AM, Gabriel Balan <[hidden email]> wrote:


Hi

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.

Can it be there is no more space left (for HDFS) on the host running data nodes?

Try running "hdfs dfsadmin -report"

hth

Gabriel Balan


On 7/24/2016 7:53 PM, Madhav Sharan wrote:
Hi hadoop users,

We are running a mapreduce jobs with 10 nodes. Each  map job process a video and generate a .txt file as output. We are getting DataStreamer Exception that File could only be replicated to 0 nodes instead of minReplication (=1). This is the output file we expect after successful run. 
 
Any help is appreciated. We checked hdfs has space available and all nodes are responding.
 
Full trace - 
 
2016-07-24 21:55:08,343 WARN [Thread-214] org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 9 datanode(s) running and no node(s) are excluded in this operation.
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

        at org.apache.hadoop.ipc.Client.call(Client.java:1475)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy12.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        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:191)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy13.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1459)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1255)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)

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Madhav Sharan
 

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The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation.