After deep investigation of specific OOMs, it seems I can't set -Xmx1024m for MapRed tasks; memory analysis (for Mappers & Reducers) always shows magic -Xmx (maximal heap size) is 536870912 bytes
At the same time, for TaskTracker it shows -Xmx (maximal heap size) is 1048576000 bytes Strange! Hadoop 0.19.2, with hadoop-site.xml properly replicated in cluster... <property> <name>mapred.child.java.opts</name> <value>-server -Xms1g -Xmx1g</value> Has anyone had anything like that? I can't set -Xmx! -Fuad http://www.tokenizer.ca
