Problem with Big Data Extensions (HDFS)

KNIME Analytics Platform
1

Unfortuanatly I get an error using the HDFS Connector in combination with the Impala Loade, respectively the Upload Node:

ERROR     Upload                             Execute failed: Failed on local exception: com.google.protobuf.InvalidProtocolBufferException: Protocol message end-group tag did not match expected tag.; Host Details : local host is: "xxxx.tubit.tu-berlin.de/xxxxx"; destination host is: "clouderavm":50070;

I actually have no idea how to solve this problem.

 

Thanks in advance

2

Hi,

is it possible that your HDFS Connector and the Impala Connector are connected to different servers? They need to point to the same server.

Bye,

Tobias

3

Hi,

both connectors are connected to the same server (it's a virtual machine). Even if I try it with knime installed inside this VM, I get this error.

 

ERROR     Upload                             Execute failed: Failed on local exception: com.google.protobuf.InvalidProtocolBufferException: Protocol message end-group tag did not match expected tag.; Host Details : local host is: "localhost:50070/127.0.01"; destination host is: "localhost":50070;

 

Thanks for your answer.

4

Hi,

is your HDFS name node running and configured to listen on port 50070? Have you tryed to execute a hdfs command via the local comand line? I have found a related post at Stackoverflow which might help you with the problem.

Bye,

Tobias