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https://issues.apache.org/jira/browse/TEZ-2000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294875#comment-14294875
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Jeff Zhang commented on TEZ-2000:
---------------------------------
[~sseth] hashCode() is not guaranteed to be unique. Here's one example I
extracted from pig that 2 edges has different input vertex and output vertex,
but has the same hashCode.
{code}
Vertex v1 = Vertex.create("scope-6", ProcessorDescriptor.create("p"));
Vertex v2 = Vertex.create("scope-30", ProcessorDescriptor.create("p"));
Vertex v3 = Vertex.create("scope-7", ProcessorDescriptor.create("p"));
Vertex v4 = Vertex.create("scope-20", ProcessorDescriptor.create("p"));
UnorderedKVEdgeConfig edgeConf1 = UnorderedKVEdgeConfig.newBuilder(
Text.class.getName(), NullWritable.class.getName()).build();
Edge e1 = Edge
.create(v1, v2, edgeConf1.createDefaultOneToOneEdgeProperty());
Edge e2 = Edge
.create(v3, v4, edgeConf1.createDefaultOneToOneEdgeProperty());
LOG.info(e1.hashCode());
LOG.info(e2.hashCode());
{code}
> Source vertex exists error during DAG submission
> ------------------------------------------------
>
> Key: TEZ-2000
> URL: https://issues.apache.org/jira/browse/TEZ-2000
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Rohini Palaniswamy
> Assignee: Jeff Zhang
> Attachments: TEZ-2000-1.patch
>
>
> Pig e2e tests - Cross_5, Union_4 and Union_9 fail. This is due to some jira
> that went in after TEZ-1931, but from the titles I cannot easily associate
> one that could cause this failure.
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