Maybe some code of MapTask is wrong. ------------------------------------ Key: MAPREDUCE-1555 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1555 Project: Hadoop Map/Reduce Issue Type: Bug Components: task Reporter: Ruyue Ma
{code:title=MapTask.java|borderStyle=solid} public void write(DataOutput out) throws IOException { super.write(out); if (isMapOrReduce()) { splitMetaInfo.write(out); splitMetaInfo = null; // HERE: why set null ?????? } } {code} In above code, if the splitMetaInfo is set null, Second Serialization (will invoke write) will throw NullPointerException. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.