[ 
https://issues.apache.org/jira/browse/HTTPCLIENT-1313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13569068#comment-13569068
 ] 

Clinton Nielsen commented on HTTPCLIENT-1313:
---------------------------------------------

I checked the source of 
org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager.releaseConnection 
in 4.2.x against the trunk.

4.2.x:
  if ((hca.getPoolEntry() != null) && (hca.getManager() != this)) {
    throw new IllegalArgumentException ("Connection not obtained from this 
manager.");
  }

trunk:
  Asserts.check(hca.getPoolEntry() == null, "Connection not obtained from this 
manager");
  Asserts.check(hca.getManager() == this, "Connection not obtained from this 
manager");

The two are not logically equivalent. When I changed the trunk to the 
following, everything worked:

  Asserts.check((hca.getPoolEntry() == null) || (hca.getManager() == this), 
"Conection not obtained from this manager");

                
> IllegalStateException when using AWS SDK
> ----------------------------------------
>
>                 Key: HTTPCLIENT-1313
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1313
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.3 Alpha1
>            Reporter: Clinton Nielsen
>             Fix For: 4.3 Alpha2
>
>
> As noted on the AWS developer forum here: 
> https://forums.aws.amazon.com/message.jspa?messageID=417487, an 
> IllegalStateException occurs when attempting to connect to AWS while using 
> 4.3-alpha1
> I stepped through the code, and found that the failure occurs at line 132 in 
> the open(...) function in org.apache.http.impl.conn.AbstractPoolEntry.
>     Asserts.notNull(this.tracker, "Route tracker");   <== FAILS | 
> this.tracker is null
> Commenting lines 132 and 133 made the problem go away (ie, I was able to 
> communicate succesfully with AWS, with no errors or warnings), though I've 
> done no research into what a proper fix might be.

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