[KNOX-1245] Failed to edit workflow from Ambari workflow Manager while accessing Ambari UI over Knox

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 0.14.0
• Assignee: Sandeep More
• Reporter: Raghavender Rao Guruvannagari
• Created: 11/Apr/18 07:01
• Updated: 08/Nov/18 19:51
• Resolved: 08/Nov/18 19:51

Description

Ambari workflow manager view is accessed over knox, editing the workflow from the view will fail as knox fails to identify/parse the xml format.

Exception in knox logs

==> gateway.log <==
2018-03-28 10:16:25,542 ERROR hadoop.gateway (AbstractGatewayFilter.java:doFilter(63)) - Failed to execute filter: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.InputStreamReader@254359d8; line: 1, column: 2]
2018-03-28 10:16:25,542 ERROR hadoop.gateway (AbstractGatewayFilter.java:doFilter(63)) - Failed to execute filter: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.InputStreamReader@254359d8; line: 1, column: 2]
2018-03-28 10:16:25,542 ERROR hadoop.gateway (AbstractGatewayFilter.java:doFilter(63)) - Failed to execute filter: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.InputStreamReader@254359d8; line: 1, column: 2]
2018-03-28 10:16:25,543 ERROR hadoop.gateway (GatewayFilter.java:doFilter(141)) - Gateway processing failed: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.InputStreamReader@254359d8; line: 1, column: 2]
com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.InputStreamReader@254359d8; line: 1, column: 2]
 at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1369)
 at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:599)
 at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:520)
 at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._handleUnexpectedValue(ReaderBasedJsonParser.java:1379)
 at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:669)
 at org.apache.hadoop.gateway.filter.rewrite.impl.json.JsonFilterReader.read(JsonFilterReader.java:89)
 at org.apache.hadoop.gateway.filter.rewrite.impl.json.JsonUrlRewriteFilterReader.read(JsonUrlRewriteFilterReader.java:32)
 at org.apache.commons.io.input.ReaderInputStream.fillBuffer(ReaderInputStream.java:198)
 at org.apache.commons.io.input.ReaderInputStream.read(ReaderInputStream.java:242)

==> gateway-audit.log <==
18/03/28 10:16:25 ||6e7f841c-3aa9-4d8f-a71f-bfbc6138dedf|audit|10.200.4.250|AMBARI|anonymous|||access|uri|/gateway/ui/ambari/api/v1/views/WORKFLOW_MANAGER/versions/1.0.0/instances/wfm/resources/proxy/readWorkflow?workflowPath=/user/admin/workflow.xml&jobType=WORKFLOW|failure|

Issue Links

• duplicates: KNOX-1557 Knox service cannot be added to proxied Ambari (through Knox) because master password field is readonly