[NUTCH-1435] Host jobs throw NullPointerException with MySQL

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: nutchgora
• Fix Version/s: 2.1
• Component/s: injector
• Assignee: Lewis John McGibbney
• Reporter: Lewis John McGibbney
• Created: 22/Jul/12 12:44
• Updated: 22/May/13 03:53
• Resolved: 23/Jul/12 11:12

Description

As described by Joan Espasa Arxer on user@ [0] the following NPE is thrown when we attempt to use the hostinject, updatehostdb and readhostdb jobs.

HostInjectorJob: org.apache.gora.util.GoraException:
java.lang.NullPointerException
at
org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:167)
 at
org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:135)
at
org.apache.nutch.storage.StorageUtils.createWebStore(StorageUtils.java:69)
 at org.apache.nutch.host.HostInjectorJob.inject(HostInjectorJob.java:146)
at org.apache.nutch.host.HostInjectorJob.run(HostInjectorJob.java:160)
 at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.host.HostInjectorJob.main(HostInjectorJob.java:174)
Caused by: java.lang.NullPointerException
at org.apache.gora.sql.store.SqlStore.addColumn(SqlStore.java:790)
at org.apache.gora.sql.store.SqlStore.createSqlTable(SqlStore.java:802)
 at org.apache.gora.sql.store.SqlStore.initialize(SqlStore.java:165)
at
org.apache.gora.store.DataStoreFactory.initializeDataStore(DataStoreFactory.java:102)
 at
org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:161)
... 6 more

Ferdy proposed a fix for this which I will patch against 2.X branch and duly attach.

[0] http://www.mail-archive.com/user%40nutch.apache.org/msg06998.html

Issue Links

• is related to: GORA-158 Improve error logging when gora-$module-mapping.xml is not correctly defined