In Oracle Loader For Hadoop job , mapred.JobClient fails with 'IO Error: The Network Adapter could not establish the connection' (Doc ID 1475995.1)

Last updated on FEBRUARY 08, 2017

Applies to:

Oracle Loader for Hadoop - Version 1.1.0 and later
Linux x86-64
***Checked for relevance on 02-May-2014***

Symptoms

Running a job with Oracle Loader for Hadoop and mapred.JobClient fails with the following exception:

12/07/17 21:26:56 INFO mapred.JobClient: Running job: job_201206270622_0110
12/07/17 21:26:57 INFO mapred.JobClient:  map 0% reduce 0%
12/07/17 21:27:04 INFO mapred.JobClient:  map 100% reduce 0%
12/07/17 21:27:11 INFO mapred.JobClient:  map 100% reduce 33%
12/07/17 21:27:14 INFO mapred.JobClient: Task Id : attempt_201206270622_0110_r_000000_0, Status : FAILED
java.io.IOException: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
        at oracle.hadoop.loader.lib.output.JDBCOutputFormat.getRecordWriter(JDBCOutputFormat.java:117)
        at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:559)
        at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:414)
        at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157)
        at org.apache.hadoop.mapred.Child.main(Child.java:264)
Caused by: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:458)
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236)
        at oracle.jdbc.driver.T4

Cause

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