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https://issues.apache.org/jira/browse/KNOX-247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13894450#comment-13894450
]
Vladimir Tkhir commented on KNOX-247:
-------------------------------------
Exception occurs on rewriting xml responses with default namespace. It is not
only the Oozie specific issue.
Also found that Knox erases default namespace URI during rewrite process.
Attached patch fixes both issues
> Exception in Oozie workflow definition respose rewrite
> -------------------------------------------------------
>
> Key: KNOX-247
> URL: https://issues.apache.org/jira/browse/KNOX-247
> Project: Apache Knox
> Issue Type: Bug
> Affects Versions: 0.3.0
> Reporter: Vladimir Tkhir
> Assignee: Vladimir Tkhir
> Fix For: 0.4.0
>
> Attachments: KNOX-247.patch
>
>
> Request
> #curl -i -k -u guest:guest-password -X GET
> 'https://localhost:8443/gateway/sandbox/oozie/v1/job/{JobID}?show=definition'
> returns exception:
> Caused by: java.lang.IllegalArgumentException: prefix cannot be "null" when
> creating a QName
> at javax.xml.namespace.QName.<init>(QName.java:253)
> at
> org.apache.hadoop.gateway.filter.rewrite.impl.xml.XmlFilterReader.extractQName(XmlFilterReader.java:386)
> at
> org.apache.hadoop.gateway.filter.rewrite.impl.xml.XmlFilterReader.processCharacters(XmlFilterReader.java:502)
> at
> org.apache.hadoop.gateway.filter.rewrite.impl.xml.XmlFilterReader.processEvent(XmlFilterReader.java:159)
> at
> org.apache.hadoop.gateway.filter.rewrite.impl.xml.XmlFilterReader.read(XmlFilterReader.java:117)
> at
> org.apache.commons.io.input.ReaderInputStream.fillBuffer(ReaderInputStream.java:198)
> at
> org.apache.commons.io.input.ReaderInputStream.read(ReaderInputStream.java:242)
> at
> org.apache.commons.io.input.ReaderInputStream.read(ReaderInputStream.java:261)
> at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:68)
> at
> org.apache.hadoop.gateway.filter.rewrite.impl.UrlRewriteResponse.streamResponse(UrlRewriteResponse.java:145)
> at
> org.apache.hadoop.gateway.filter.GatewayResponseWrapper.streamResponse(GatewayResponseWrapper.java:58)
> at
> org.apache.hadoop.gateway.dispatch.AbstractGatewayDispatch.writeResponse(AbstractGatewayDispatch.java:92)
> at
> org.apache.hadoop.gateway.dispatch.HttpClientDispatch.executeRequest(HttpClientDispatch.java:153)
> While direct access to Oozie is successful:
> #curl -ikv http://hdp:11000/oozie/v1/job/{JobID}?show=definition
> returns:
> <!--
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> The ASF licenses this file to You under the Apache License, Version 2.0
> (the "License"); you may not use this file except in compliance with
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> See the License for the specific language governing permissions and
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> -->
> <workflow-app xmlns="uri:oozie:workflow:0.2" name="wordcount-workflow">
> <start to="root-node"/>
> <action name="root-node">
> <java>
> <job-tracker>${jobTracker}</job-tracker>
> <name-node>${nameNode}</name-node>
> <main-class>org.apache.hadoop.examples.WordCount</main-class>
> <arg>${inputDir}</arg>
> <arg>${outputDir}</arg>
> </java>
> <ok to="end"/>
> <error to="fail"/>
> </action>
> <kill name="fail">
> <message>Java failed, error
> message[${wf:errorMessage(wf:lastErrorNode())}]</message>
> </kill>
> <end name="end"/>
> </workflow-app>
> The direct response from Oozie is
> <root xmlns="http://hortonworks.com/xml/ns";><test>value</test></root>
> and Knox is turning this into the below which is invalid XML.
> output XML: <root xmlns=""><test>value</test></root>
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