[ http://issues.apache.org/jira/browse/HADOOP-764?page=comments#action_12456417 ] dhruba borthakur commented on HADOOP-764: -----------------------------------------
All those other places you mention actually contain references to the same block object. The block object is created when the blockReport RPC arrives at the namenode, and then references to it are stored in Namenode.blockMap as well as DatanodeDescriptor.blocks. > The memory consumption of processReport() in the namenode can be reduced > ------------------------------------------------------------------------ > > Key: HADOOP-764 > URL: http://issues.apache.org/jira/browse/HADOOP-764 > Project: Hadoop > Issue Type: Bug > Components: dfs > Reporter: dhruba borthakur > Assigned To: dhruba borthakur > Attachments: processBlockReport3.patch > > > The FSNamesystem.processReport() method converts the blocklist for a datanode > into an array by calling node.getBlocks(). Although this memory allocation is > transient, it could possibly require the garbage-collector to work that much > harder. > The method Block.getBlocks() should be deprecated. Code that currently uses > this method should instead iterate over the Collection. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
