cloudera Oozie sqoop2 job hangs running forever Heart beat Heart beat - sqoop

Question

I am trying to run two sqoop jobs in parallel using oozie. But two jobs are stuck after 95 % , other two are in accepted state.I have also increased yarn resource maximum memory . also added
<name>mapred.tasktracker.map.tasks.maximum</name>
<value>50 </value>
in mapred-site.xml , but nothing helped. please help.
Yarn Cluster Metrix:
Apps Submitted 4
Apps Pending 2
Apps Running 2
Apps Completed 0
Containers Running 4
Memory Used 10GB
Memory Total 32GB
Memory Reserved 0B
VCores Used 4
VCores Total 24
VCores Reserved 0
Active Nodes 4
Decommissioned Nodes 0
Lost Nodes 0
Unhealthy Nodes 0
Rebooted Nodes 0
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Sysout Log
========================================================================
3175 [main] WARN org.apache.sqoop.tool.SqoopTool - $SQOOP_CONF_DIR has not been set in the environment. Cannot check for additional configuration.
3198 [main] INFO org.apache.sqoop.Sqoop - Running Sqoop version: 1.4.5-cdh5.2.0
3212 [main] WARN org.apache.sqoop.tool.BaseSqoopTool - Setting your password on the command-line is insecure. Consider using -P instead.
3213 [main] INFO org.apache.sqoop.tool.BaseSqoopTool - Using Hive-specific delimiters for output. You can override
3213 [main] INFO org.apache.sqoop.tool.BaseSqoopTool - delimiters with --fields-terminated-by, etc.
3224 [main] WARN org.apache.sqoop.ConnFactory - $SQOOP_CONF_DIR has not been set in the environment. Cannot check for additional configuration.
3280 [main] INFO org.apache.sqoop.manager.oracle.OraOopManagerFactory - Data Connector for Oracle and Hadoop is disabled.
3293 [main] INFO org.apache.sqoop.manager.SqlManager - Using default fetchSize of 1000
3297 [main] INFO org.apache.sqoop.tool.CodeGenTool - Beginning code generation
3951 [main] INFO org.apache.sqoop.manager.OracleManager - Time zone has been set to GMT
4023 [main] INFO org.apache.sqoop.manager.SqlManager - Executing SQL statement: SELECT t.* FROM PT_PRELIM_FINDING_V t WHERE 1=0
4068 [main] INFO org.apache.sqoop.orm.CompilationManager - HADOOP_MAPRED_HOME is /opt/cloudera/parcels/CDH-5.2.0-1.cdh5.2.0.p0.36/lib/hadoop-mapreduce
5925 [main] INFO org.apache.sqoop.orm.CompilationManager - Writing jar file: /tmp/sqoop-nobody/compile/0dab11f6545d8ef69d6dd0f6b9041a50/PT_PRELIM_FINDING_CYTOGEN_V.jar
5937 [main] INFO org.apache.sqoop.mapreduce.ImportJobBase - Beginning import of PT_PRELIM_FINDING_V
5962 [main] INFO org.apache.sqoop.manager.OracleManager - Time zone has been set to GMT
5981 [main] WARN org.apache.sqoop.mapreduce.JobBase - SQOOP_HOME is unset. May not be able to find all job dependencies.
6769 [main] INFO org.apache.sqoop.mapreduce.db.DBInputFormat - Using read commited transaction isolation
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Answer 1

Thanks #abeaamase.
I asked our DBA to increase oracle database max process to 750 and max session pool to around 1.5 times process size i.e 1125.
This has solved the issue. This has nothing to do with yarn memory.Unfortunately in sqoop2 this exception is not handled.
Please feel free to add more answers,if you feel this explanation is not appropriate.