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https://issues.apache.org/jira/browse/TEZ-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hitesh Shah updated TEZ-1148:
-----------------------------
Status: Open (was: Patch Available)
> Exception thrown when old MapRunnable implementation is specified for a
> MapProcessor vertex
> -------------------------------------------------------------------------------------------
>
> Key: TEZ-1148
> URL: https://issues.apache.org/jira/browse/TEZ-1148
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.4.0, 0.5.0
> Reporter: Mariappan Asokan
> Assignee: Mariappan Asokan
> Attachments: tez-1148.patch
>
>
> When a MapProcessor vertex was configured with an implementation of
> MapRunnable, following exception was thrown:
> {code}
> Exception in thread "main" java.io.IOException:
> mapreduce.job.inputformat.class is incompatible with map compatability mode.
> at
> org.apache.tez.mapreduce.hadoop.MRHelpers.ensureNotSet(MRHelpers.java:629)
> at
> org.apache.tez.mapreduce.hadoop.MRHelpers.setUseNewAPI(MRHelpers.java:603)
> ....
> {code}
> The problem seems to be in {{MRHelpers.setUseNewAPI().}} The check for the
> existence of a {{MapRunnable}} implementation is missing which leads to an
> incorrect conclusion that new APIs are used. This problem exists in the
> trunk version as well.
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