svn commit: r1310429 - /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java

[jm...@apache.org]

Author: jmhsieh
Date: Fri Apr  6 16:03:42 2012
New Revision: 1310429

URL: http://svn.apache.org/viewvc?rev=1310429&view=rev
Log:
HBASE-5680 Improve compatibility warning about HBase with Hadoop 0.23.x

Modified:
    hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java

Modified: hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
URL: http://svn.apache.org/viewvc/hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java?rev=1310429&r1=1310428&r2=1310429&view=diff
==============================================================================
--- hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java (original)
+++ hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java Fri Apr  6 16:03:42 2012
@@ -357,7 +357,17 @@ Server {
         loop();
       }
     } catch (Throwable t) {
-      abort("Unhandled exception. Starting shutdown.", t);
+      // HBASE-5680: Likely hadoop23 vs hadoop 20.x/1.x incompatibility
+      if (t instanceof NoClassDefFoundError && 
+          t.getMessage().contains("org/apache/hadoop/hdfs/protocol/FSConstants$SafeModeAction")) {
+          // improved error message for this special case
+          abort("HBase is having a problem with its Hadoop jars.  You may need to "
+              + "recompile HBase against Hadoop version "
+              +  org.apache.hadoop.util.VersionInfo.getVersion()
+              + " or change your hadoop jars to start properly", t);
+      } else {
+        abort("Unhandled exception. Starting shutdown.", t);
+      }
     } finally {
       startupStatus.cleanup();