Lost heartbeat response containing MapTask throws NPE when it is resent -----------------------------------------------------------------------
Key: MAPREDUCE-2237 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2237 Project: Hadoop Map/Reduce Issue Type: Bug Components: jobtracker Affects Versions: 0.21.0, 0.20.2, 0.22.0 Reporter: Todd Lipcon When the JT sends a heartbeat response, it records it in trackerToHeartbeatResponseMap. But after MapTask writes its input split, it sets that split to null (assumedly to save memory?). So, if the heartbeat response is lost, and the JT needs to resend it, it will throw NPE since the split information has been lost. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.