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https://issues.apache.org/jira/browse/YARN-1728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13902145#comment-13902145
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Gera Shegalov commented on YARN-1728:
-------------------------------------
This must have something to do with how Jetty web container interprets
percent-encoding RFC. The node id is resolved out of
[getPathInfo|http://docs.oracle.com/javaee/5/api/javax/servlet/http/HttpServletRequest.html#getPathInfo()],
which does the decoding. [Section
2.4|http://tools.ietf.org/html/rfc3986#section-2.4] says
{quote}"Implementations must not
percent-encode or decode the same string more than once, as decoding
an already decoded string might lead to misinterpreting a percent
data octet as the beginning of a percent-encoding, or vice versa in
the case of percent-encoding an already percent-encoded string."{quote}
Thus it would be incorrect to attempt decoding once again. On the other hand,
since ':' has no special meaning for the path component unlike '/', Jetty might
have chosen not to interpret %3A .
> History server doesn't understand percent encoded paths
> -------------------------------------------------------
>
> Key: YARN-1728
> URL: https://issues.apache.org/jira/browse/YARN-1728
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Abraham Elmahrek
>
> For example, going to the job history server page
> http://localhost:19888/jobhistory/logs/localhost%3A8041/container_1391466602060_0011_01_000001/job_1391466602060_0011/admin/stderr
> results in the following error:
> {code}
> Cannot get container logs. Invalid nodeId:
> test-cdh5-hue.ent.cloudera.com%3A8041
> {code}
> Where the url decoded version works:
> http://localhost:19888/jobhistory/logs/localhost:8041/container_1391466602060_0011_01_000001/job_1391466602060_0011/admin/stderr
> It seems like both should be supported as the former is simply percent
> encoding.
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