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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCORE-270) IllegalStateException in AbstractSessionOutputBuffer
Date Wed, 24 Aug 2011 14:22:29 GMT

    [ https://issues.apache.org/jira/browse/HTTPCORE-270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13090244#comment-13090244
] 

Oleg Kalnichevski commented on HTTPCORE-270:
--------------------------------------------

Yes, please do bounce this discussion to the dev list. I'll answer your questions from there.

Oleg 

> IllegalStateException in AbstractSessionOutputBuffer
> ----------------------------------------------------
>
>                 Key: HTTPCORE-270
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-270
>             Project: HttpComponents HttpCore
>          Issue Type: Bug
>          Components: HttpCore
>    Affects Versions: 4.2-alpha1
>            Reporter: William R. Speirs
>            Priority: Critical
>             Fix For: 4.2-alpha2
>
>         Attachments: SocketOutputBuffer.diff
>
>
> I am using httpclient-4.1.2 & httpcore-4.2-alpha1. In making an DefaultHttpClient.execute()
call I get the following exception:
>  java.lang.IllegalStateException: Current state = RESET, new state = FLUSHED
> 	at java.nio.charset.CharsetEncoder.throwIllegalStateException(CharsetEncoder.java:951)
> 	at java.nio.charset.CharsetEncoder.flush(CharsetEncoder.java:640)
> 	at org.apache.http.impl.io.AbstractSessionOutputBuffer.writeEncoded(AbstractSessionOutputBuffer.java:264)
> 	at org.apache.http.impl.io.AbstractSessionOutputBuffer.writeLine(AbstractSessionOutputBuffer.java:247)
> 	at org.apache.http.impl.conn.LoggingSessionOutputBuffer.writeLine(LoggingSessionOutputBuffer.java:99)
> 	at org.apache.http.impl.io.AbstractMessageWriter.write(AbstractMessageWriter.java:97)
> 	at org.apache.http.impl.AbstractHttpClientConnection.sendRequestHeader(AbstractHttpClientConnection.java:253)
> On line 264 of AbstractSessionOutputBuffer.java, encoder.flush() is being called. My
thought (I have not completely debugged) is that in this instance, cbuf.hasRemaining() is
false, and therefor the following calls are being made:
> encoder.reset()
> encoder.flush()
> This is resulting in the above exception.
> I believe the following small patch will short-circuit the code, and fix the issue.
> Thoughts?
> Index: httpcore/src/main/java/org/apache/http/impl/io/AbstractSessionOutputBuffer.java
> ===================================================================
> --- httpcore/src/main/java/org/apache/http/impl/io/AbstractSessionOutputBuffer.java 
   (revision 1160689)
> +++ httpcore/src/main/java/org/apache/http/impl/io/AbstractSessionOutputBuffer.java 
   (working copy)
> @@ -256,6 +256,10 @@
>          if (this.bbuf == null) {
>              this.bbuf = ByteBuffer.allocate(1024);
>          }
> +       if(!cbuf.hasRemaining()) {
> +               return;
> +       }
> +
>          this.encoder.reset();
>          while (cbuf.hasRemaining()) {
>              CoderResult result = this.encoder.encode(cbuf, this.bbuf, true);

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