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Ambari Pig View not working in HDP 2.5 multi-node install

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Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

In HDP 2.5 (Ambari 2.4.2) the Pig View is not working in a multi-node install.

It works ok in the Sandbox install (single node) but fails in a multiple node installation. I have followed all the steps (proxy settings) in the Ambari Views Guide for this and previous versions, and the settings in the Pig view configuration are the same working for the Sandbox. The Pig View loads without errors but will give error when you try to run any script.

It always returns an error "Job failed to start" and the "Stack Trace" show something like:

java.net.SocketTimeoutException: Read timed out

What is more strange is that if I go to the History tab, the job appears with an error status SUBMIT_FAILED, but there is no error in the Logs and if I click in the Date link I will get the results of the job as if it had completed succesfully!!

Also using Pig from command line on the same Ambari server works perfectly.

Does anybody knows how to fix this to be able to use the Pig View without these errors!?

1 ACCEPTED SOLUTION

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Re: Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

It seems I have finally fixed this: it was really a timeout problem and the higher values I had set were not enough.

I increased views.request.read.timeout to 40 seconds:

 views.request.read.timeout.millis = 40000 

and now it's allways working (until now).

7 REPLIES 7

Re: Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

Just to give more information, the Pig script I'm using to test is basic load/dump example from the Beguinners Guide, like this:

truck_events = LOAD '/tmp/truck_event_text_partition.csv' USING PigStorage(',') 
   AS (driverId:int, truckId:int, eventTime:chararray,
  eventType:chararray, longitude:double, latitude:double,
  eventKey:chararray, correlationId:long, driverName:chararray,
  routeId:long,routeName:chararray,eventDate:chararray);
truck_events_subset = LIMIT truck_events 10;
DUMP truck_events_subset;

Re: Ambari Pig View not working in HDP 2.5 multi-node install

Mentor

I will test this and report back tomorrow

Re: Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

Any news on this?

Re: Ambari Pig View not working in HDP 2.5 multi-node install

@Luis Vazquez

As you are getting the "SocketTimeoutException: Read timed out" so will it be possible to try increasing the following properly value to bit larger in your "/etc/ambari-server/conf/ambari.properties" file to see if we are providing the enough read timeout. Sometimes some queries might take some time to execute.

views.ambari.request.read.timeout.millis=60000

- A restart of ambari server will be required after making this change.

.

Re: Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

@jss Thank you very much for your answer and suggestions.I guessed that was the deal, but I've tried this and the same problem persist. These are the changes I've made to the view timeout parameters:

-views.ambari.request.connect.timeout.millis=30000
-views.ambari.request.read.timeout.millis=45000
+views.ambari.request.connect.timeout.millis=60000
+views.ambari.request.read.timeout.millis=90000
...
-views.request.connect.timeout.millis=5000
-views.request.read.timeout.millis=10000
+views.request.connect.timeout.millis=10000
+views.request.read.timeout.millis=20000

But nothing changes and the same SUBMIT_FAILED error happens when I run any script :(

Re: Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

Something new I've noted after several tries is that even when I always get the error, sometimes the results are show correctly if I go to the execution details and sometimes they are empty. I'm including some screenshots to illustrate the situation.

Script exec error:

10098-pig-view-error-01.png

Stack trace:

10099-pig-view-error-02.png

History job error:

10100-pig-view-error-03.png

Job details: script results are OK (this happens only sometimes)

10112-pig-view-error-04.png

Highlighted

Re: Ambari Pig View not working in HDP 2.5 multi-node install

Expert Contributor

It seems I have finally fixed this: it was really a timeout problem and the higher values I had set were not enough.

I increased views.request.read.timeout to 40 seconds:

 views.request.read.timeout.millis = 40000 

and now it's allways working (until now).