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https://issues.apache.org/jira/browse/KNOX-2095?focusedWorklogId=340221&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-340221
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ASF GitHub Bot logged work on KNOX-2095:
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Author: ASF GitHub Bot
Created on: 07/Nov/19 23:09
Start Date: 07/Nov/19 23:09
Worklog Time Spent: 10m
Work Description: jameschen1519 commented on issue #177: [WIP] KNOX-2095
- Adding in DefaultDispatch code and tests to handle 504 errors
URL: https://github.com/apache/knox/pull/177#issuecomment-551308335
Grasping at straws here, but looking through the test case at
https://github.com/apache/knox/blob/89caa5feeed706abc8d7ce1407830ae00d97d405/gateway-test/src/test/java/org/apache/knox/gateway/GatewayCorrelationIdTest.java,
is it possible that the reduced timeout might be causing the issue? I'm not
completely sure how the test works, but with the change in this PR, all
connection attempts that experience a socket timeout are automatically given a
403, whereas without the change, there would at least be an attempt to contact
the failover nodes.
...then again, I suppose this wouldn't explain the successes in JDK8. It's a
bit difficult to tell without looking at the reports unfortunately.
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Issue Time Tracking
-------------------
Worklog Id: (was: 340221)
Remaining Estimate: 167h 10m (was: 167h 20m)
Time Spent: 50m (was: 40m)
> Many errors (E.G. 504s) being masked as 500 errors
> --------------------------------------------------
>
> Key: KNOX-2095
> URL: https://issues.apache.org/jira/browse/KNOX-2095
> Project: Apache Knox
> Issue Type: Improvement
> Affects Versions: 1.2.0, 1.3.0
> Reporter: James Chen
> Assignee: James Chen
> Priority: Minor
> Labels: easyfix
> Fix For: 1.4.0
>
> Attachments: KNOX-2095.patch, jamchen504patch.patch
>
> Original Estimate: 168h
> Time Spent: 50m
> Remaining Estimate: 167h 10m
>
> When errors occur while accessing the Knox gateway, errors are forcibly
> overridden and represented as 500 errors, rather than whatever errors they
> should be.
> For example, when the timeout value under gateway.httpclient.socketTimeout is
> set to a very low timeout value (E.G. 1 ms) under gateway-site.xml, a socket
> timeout exception is produced by the getHttpClient().execute(
> outboundRequest) call. However, this is caught by the surrounding try-catch
> block and thrown again as an IOException. This results in a generic 500
> error, rather than a 504 error one would normally expect from this sort of
> interaction.
>
> For these sorts of scenarios, I believe it would be prudent to create a dummy
> HttpResponse using a HttpResponseFactory object for the inboundResponse with
> the corresponding error code (E.G. HttpStatus.SC_GATEWAY_TIMEOUT in the event
> of a SocketTimeoutException) and return that instead to trigger the
> appropriate 504 error. I suspect there are other sorts of potential error
> code triggers that get this same IOException treatment that would be better
> off receiving their own error codes.
>
> Judging from the source code, this issue likely affects version 1.3.0, though
> this has not been tested.
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