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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCLIENT-1337) Either DefaultHttpRequestRetryHandler:98 should retry on InterruptedIOException, or DefaultClientConnection's opening() should throw something that can be retried.
Date Fri, 12 Apr 2013 16:22:16 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-1337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13630253#comment-13630253
] 

Oleg Kalnichevski commented on HTTPCLIENT-1337:
-----------------------------------------------

Bill
Do I understand this correctly that the main problem is not about not retrying the request
automatically but rather about some unit tests failing with InterruptedIOException unexpectedly?


To answer your question: I do not think that one aborted request poisoning subsequent request(s)
is likely. Requests never get hold of the real connection object. What they get is a dynamic
proxy that among many things keep track of whether or not request execution has been explicitly
aborted by the user. Each request gets its own connection proxy and therefore should be fully
insulated from other requests. What is more likely, though, is that unit tests are not fully
isolated and may be leaking state.

Oleg
                
> Either DefaultHttpRequestRetryHandler:98 should retry on InterruptedIOException, or DefaultClientConnection's
opening() should throw something that can be retried.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1337
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1337
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.2.2
>         Environment: On a linux 2.6 x86 box with 4.2.1 http client library.
>            Reporter: Bill Murphy
>            Priority: Minor
>
> I have seen a stack like the following:
> Caused by: java.io.InterruptedIOException: Connection already shutdown 
> 	at org.apache.http.impl.conn.DefaultClientConnection.opening(DefaultClientConnection.java:121)

> 	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:169)

> 	at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:151) 
> 	at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:125)

> 	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)

> 	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)

> 	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)

> 	at waggle.core.http.impl41.XHTTP41Session.executeMethod(XHTTP41Session.java:358)  
> And I've read Issue #881, but that doesn't seem to contain the fix for my problem. 
> I don't really understand the line that throws the InterruptedIOException, as it seems
to me, it should just retry right then. If it cannot retry right then, why doesn't the DefaultHttpRequestRetryHandler
perform a retry under these circumstances?
> I cannot make this exception happen with total reliability, but it breaks one of our
automated builds test runs about 2 times per week. I'm hoping I've included enough information
to be of some use, if I can answer any questions or provide any more information (or if there's
something else I should do on my side instead of reporting this as an issue), please advise
me via email as I might not check back with this issue tracking system.
> Thanks!

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