Could only be replicated to 0 nodes, instead of 1

[Stas Oskin]

Hi.

I'm testing Hadoop in our lab, and started getting the following message
when trying to copy a file:
Could only be replicated to 0 nodes, instead of 1

I have the following setup:

* 3 machines, 2 of them with only 80GB of space, and 1 with 1.5GB
* Two clients are copying files all the time (one of them is the 1.5GB
machine)
* The replication is set on 2
* I let the space on 2 smaller machines to end, to test the behavior

Now, one of the clients (the one located on 1.5GB) works fine, and the other
one - the external, unable to copy and displays the error + the exception
below

Any idea if this expected on my scenario? Or how it can be solved?

Thanks in advance.



09/05/21 10:51:03 WARN dfs.DFSClient: NotReplicatedYetException sleeping
/test/test.bin retries left 1

09/05/21 10:51:06 WARN dfs.DFSClient: DataStreamer Exception:
org.apache.hadoop.ipc.RemoteException: java.io.IOException: File
/test/test.bin could only be replicated to 0 nodes, instead of 1

            at
org.apache.hadoop.dfs.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1123
)

            at org.apache.hadoop.dfs.NameNode.addBlock(NameNode.java:330)

            at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)

            at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25
)

            at java.lang.reflect.Method.invoke(Method.java:597)

            at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)

            at org.apache.hadoop.ipc.Server$Handler.run(Server.java:890)



            at org.apache.hadoop.ipc.Client.call(Client.java:716)

            at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)

            at org.apache.hadoop.dfs.$Proxy0.addBlock(Unknown Source)

            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.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82
)

            at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59
)

            at org.apache.hadoop.dfs.$Proxy0.addBlock(Unknown Source)

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2450
)

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2333
)

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.access$1800(DFSClient.java:1745
)

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:1922
)



09/05/21 10:51:06 WARN dfs.DFSClient: Error Recovery for block null bad
datanode[0]

java.io.IOException: Could not get block locations. Aborting...

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.processDatanodeError(DFSClient.java:2153
)

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.access$1400(DFSClient.java:1745
)

            at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:1899
)