Lewis John McGibbney created GORA-158:
-----------------------------------------
Summary: Improve error logging when gora-$module-mapping.xml is
not correctly defined
Key: GORA-158
URL: https://issues.apache.org/jira/browse/GORA-158
Project: Apache Gora
Issue Type: Bug
Components: storage
Affects Versions: 0.2
Reporter: Lewis John McGibbney
Fix For: 0.3
I've recently encountered this myself during running gora-cassandra aginst
Keith Turner's goraci module where my gora-cassandra-mapping.xml configuration
was incorrect. This has also been experienced further downstream in Nutch 2.X
land where new users are met with a rather hellish stack such as the following
{code}
12/07/21 13:04:27 INFO mapred.JobClient: Task Id :
attempt_201207211239_0003_m_000001_2, Status : FAILED
org.apache.gora.util.GoraException: java.io.IOException
at
org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:167)
at
org.apache.gora.store.DataStoreFactory.getDataStore(DataStoreFactory.java:278)
at goraci.Generator$GeneratorMapper.map(Generator.java:197)
at goraci.Generator$GeneratorMapper.map(Generator.java:179)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
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:1093)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.io.IOException
at
org.apache.gora.cassandra.store.CassandraStore.initialize(CassandraStore.java:88)
at
org.apache.gora.store.DataStoreFactory.initializeDataStore(DataStoreFactory.java:102)
at
org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:161)
... 11 more
Caused by: java.lang.NullPointerException
at
org.apache.gora.cassandra.store.CassandraMapping.<init>(CassandraMapping.java:117)
at
org.apache.gora.cassandra.store.CassandraMappingManager.get(CassandraMappingManager.java:84)
at
org.apache.gora.cassandra.store.CassandraClient.initialize(CassandraClient.java:83)
at
org.apache.gora.cassandra.store.CassandraStore.initialize(CassandraStore.java:85)
... 13 more
{code}
We should implement much better logging for this which clearly specifies that
it is a mapping problem due to incorrect mapping configuration.
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