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Hitesh Shah commented on TEZ-3440: ---------------------------------- \cc [~rajesh.balamohan] [~sseth] > Shuffling to memory can get out-of-sync when fetching multiple compressed map > outputs > ------------------------------------------------------------------------------------- > > Key: TEZ-3440 > URL: https://issues.apache.org/jira/browse/TEZ-3440 > Project: Apache Tez > Issue Type: Bug > Reporter: Nathan Roberts > > Haven't verified yet but certainly looks like tez needs same fix as > MAPREDUCE-5308 in IFile. > Specifically saw this because downstream tasks were reporting enough fetch > failures that long-running upstream tasks had to be re-run, which makes job > run for much longer than it needs. > Usually shows itself as an "Invalid map id" error on a multi-map fetch on > part 2-n (i.e. never the first one). > -- This message was sent by Atlassian JIRA (v6.3.4#6332)