Antti Järvinen created STORM-2331:
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Summary: Anchoring emit in JavaScript bolt only works with one
anchor
Key: STORM-2331
URL: https://issues.apache.org/jira/browse/STORM-2331
Project: Apache Storm
Issue Type: Bug
Components: storm-multilang
Reporter: Antti Järvinen
org.apache.storm.task.ShellBolt.handleEmit method expects to find list of tuple
ids from the message to anchor the emit to.
The storm.js function __emit can only handle case of specifying exactly one
anchor. If none is specified the message will contain anchor list [undefined]
and if multiple anchors are specified the message will contain nested anchor
list [["anchor1", "anchor2"]].
In the case of not anchoring to any the ShellBolt will throw runtime exception
when ConcurrentHashMap tries to call .hashCode() on null. In the case of
multiple anchors the ShellBolt will throw an error of "Anchored onto anchorId
after ack/fail".
The fix should be made in storm.js
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