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https://issues.apache.org/jira/browse/NIFI-1714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15224439#comment-15224439
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Joseph Percivall commented on NIFI-1714:
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So I wasn't able to resolve all the issues with the example site but I did see
the warning go away. I also tested GetHttp to hit sites normally as well as
follow redirects with no problems. So since it's not impacting the existing
functionality but helps solve a known issue on your side, I am a +1.
> GetHTTP fails to parse certain cookie expiration dates
> ------------------------------------------------------
>
> Key: NIFI-1714
> URL: https://issues.apache.org/jira/browse/NIFI-1714
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Affects Versions: 0.6.0
> Reporter: Michael Moser
> Assignee: Michael Moser
> Fix For: 0.6.1
>
> Attachments: NIFI-1714-withtests.patch, NIFI-1714.patch
>
>
> I'm trying to use GetHTTP to access a web server that assigns a _session
> cookie then redirects to another URL that expects that cookie to be set.
> Normally the Apache HTTPComponents HttpClient handles this.
> Unfortunately, due to a bug HTTPCLIENT-1640, the HttpClient fails to parse
> this particular server's _session cookie expiration date. The error is
> WARN o.a.h.c.p.ResponseProcessCookies Invalid Cookie Header: "Set-Cookie:
> _session=abc123; path=/; expires=Wed, 06 Apr 2016 22:10:16 -0000". Invalid
> 'expires' attribute: Wed, 06 Apr 2016 22:10:16 -000
> ERROR o.a.n.p.s.GetHTTP Failed to retrieve file from http://fqdn/url due to
> null; rolling back session: org.apache.http.client.ClientProtocolException
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