[jira] [Created] (TRAFODION-2301) Hadoop stack crash with LOGS TMUDF

["Roberta Marton (JIRA)" <ji...@apache.org>]

Roberta Marton created TRAFODION-2301:
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             Summary: Hadoop stack crash with LOGS TMUDF
                 Key: TRAFODION-2301
                 URL: https://issues.apache.org/jira/browse/TRAFODION-2301
             Project: Apache Trafodion
          Issue Type: Bug
          Components: sql-general
            Reporter: Roberta Marton
            Assignee: Roberta Marton


There seems to be a problem  is a that shows up when a tdm_udrsrvr process takes  most of the available Memory. When this happens, too much CPU time is being used to handle this memory issue which causes some of Hadoop processes to crash due to  lack of resources.  In addition, Linux is slow to respond from the terminal.
 
It can be reproduced from DB Mgr using log page which calls UDR in the backend.  Calling this UDF (event_log_reader) from sqlci can also reproduce the problem.
 
When using sqlci, SQL prints out the udrserver process launched info but then just hangs.
>>select [first 1]* from udf(event_log_reader()); 



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