[jira] Commented: (PIG-634) When POUnion is one of the roots of a map plan, POUnion.getNext() gives a null pointer exception
[ https://issues.apache.org/jira/browse/PIG-634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667439#action_12667439 ] Pradeep Kamath commented on PIG-634: Patch committed > When POUnion is one of the roots of a map plan, POUnion.getNext() gives a > null pointer exception > > > Key: PIG-634 > URL: https://issues.apache.org/jira/browse/PIG-634 > Project: Pig > Issue Type: Bug >Affects Versions: types_branch >Reporter: Pradeep Kamath >Assignee: Pradeep Kamath > Fix For: types_branch > > Attachments: PIG-634.patch > > > POUnion.getnext() gives a null pointer exception in the following scenario > (pasted from a code comment explaining the fix for this issue). If a script > results in a plan like the one below, currently POUnion.getNext() gives a > null pointer exception > {noformat} > > // POUnion > // | > // |--POLocalRearrange > // || > // ||-POUnion (root 2)--> This union's getNext() can lead > the code here > // | > // |--POLocalRearrange (root 1) > > // The inner POUnion above is a root in the plan which has 2 > roots. > // So these 2 roots would have input coming from different > input > // sources (dfs files). So certain maps would be working on > input only > // meant for "root 1" above and some maps would work on input > // meant only for "root 2". In the former case, "root 2" would > // neither get input attached to it nor does it have > predecessors > {noformat} > A script which can cause a plan like above is: > {code} > a = load 'xyz'; > b = load 'abc'; > c = union a,b; > d = load 'def'; > e = cogroup c by $0 inner , d by $0 inner; > dump e; > {code} -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (PIG-634) When POUnion is one of the roots of a map plan, POUnion.getNext() gives a null pointer exception
[ https://issues.apache.org/jira/browse/PIG-634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667335#action_12667335 ] Olga Natkovich commented on PIG-634: +1 on the patch. Great catch! > When POUnion is one of the roots of a map plan, POUnion.getNext() gives a > null pointer exception > > > Key: PIG-634 > URL: https://issues.apache.org/jira/browse/PIG-634 > Project: Pig > Issue Type: Bug >Affects Versions: types_branch >Reporter: Pradeep Kamath >Assignee: Pradeep Kamath > Fix For: types_branch > > Attachments: PIG-634.patch > > > POUnion.getnext() gives a null pointer exception in the following scenario > (pasted from a code comment explaining the fix for this issue). If a script > results in a plan like the one below, currently POUnion.getNext() gives a > null pointer exception > {noformat} > > // POUnion > // | > // |--POLocalRearrange > // || > // ||-POUnion (root 2)--> This union's getNext() can lead > the code here > // | > // |--POLocalRearrange (root 1) > > // The inner POUnion above is a root in the plan which has 2 > roots. > // So these 2 roots would have input coming from different > input > // sources (dfs files). So certain maps would be working on > input only > // meant for "root 1" above and some maps would work on input > // meant only for "root 2". In the former case, "root 2" would > // neither get input attached to it nor does it have > predecessors > {noformat} > A script which can cause a plan like above is: > {code} > a = load 'xyz'; > b = load 'abc'; > c = union a,b; > d = load 'def'; > e = cogroup c by $0 inner , d by $0 inner; > dump e; > {code} -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.