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https://issues.apache.org/jira/browse/HTTPCLIENT-911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831695#action_12831695
 ] 

Ziv Horesh commented on HTTPCLIENT-911:
---------------------------------------

Stack trace:
java.lang.IllegalArgumentException: Host name may not be null
    at org.apache.http.HttpHost.<init>(HttpHost.java:83)
    at
org.apache.http.impl.client.AbstractHttpClient.determineTarget(AbstractHttpClient.java:497)
    at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
    at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
    at
org.apache.shindig.gadgets.http.BasicHttpFetcher.fetch(BasicHttpFetcher.java:281)
    ....

Oleg, You are right about the exception, it is the message that through me
off the cause of the problem.






> Support underscore in domain name, or provide better exception
> --------------------------------------------------------------
>
>                 Key: HTTPCLIENT-911
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-911
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.0.1
>            Reporter: Ziv Horesh
>
> When calling on HttpClient.execute with a url that contain underscore ('_'), 
> you get NullPointerException.
> Tracing it down show that java.net.Uri complains that it is illegal name. 
> Which is true according to the RFC.
> But it seems that most browser allow it, and some companies support it.
> I think HttpClient should either support underscores, or atleast provide a 
> better exception.

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