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Ying He commented on PIG-1241: ------------------------------ no, by default it is on. boolean isAccum = "true".equalsIgnoreCase(pc.getProperties().getProperty("opt.accumulator","true")); means if "opt.accumulator" is not present, the default value is "true" > Accumulator is turned on when a map is used with a non-accumulative UDF > ----------------------------------------------------------------------- > > Key: PIG-1241 > URL: https://issues.apache.org/jira/browse/PIG-1241 > Project: Pig > Issue Type: Bug > Reporter: Ying He > Attachments: accum.patch > > > Exception is thrown for a script like the following: > register /homes/yinghe/owl/string.jar; > a = load 'a.txt' as (id, url); > b = group a by (id, url); > c = foreach b generate COUNT(a), (CHARARRAY) > string.URLPARSE(group.url)#'url'; > dump c; > In this query, URLPARSE() is not accumulative, and it returns a map. > The accumulator optimizer failed to check UDF in this case, and tries to run > the job in accumulative mode. ClassCastException is thrown when trying to > cast UDF into Accumulator interface. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.