[#DIRMINA-129] "Pipe broken" IOExceptions countered on non-active stream connections

MINA

"Pipe broken" IOExceptions countered on non-active stream connections

Created: 25/Nov/05 05:25 PM Updated: 07/Dec/05 06:03 PM

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Component/s:

None

Affects Version/s:

0.8.1

Fix Version/s:

0.8.2

Time Tracking:

Not Specified

Environment:

All

Resolution Date:

28/Nov/05 05:35 PM

Description

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The StreamIOHandler implementation uses PipedInput/Output streams for providing read data.
PipedInputStream is quite strict about the relationship between the producer and consumer thread.
When blocking on a read, PipedInputStream checks every second to see if the last producer thread to write to it is still alive. If it detects that the producer thread is no longer alive, an IO Exception is thrown indicating "Pipe Broken".

This causes a problem in Mina becuase worker threads in the ThreadPoolFilter have a "keep alive time" (default is one second). So, if a user is blocked on a stream IO read (really a PipedInputStream), and the last ThreadPoolFilter thread which produced data for the stream idles out, the user encounters a "Pipe Broken" IOException (not related to session idle).

Users can currently work around the problem by increasing the keep-alive time on the ThreadPoolFilter.

My gut feeling is that ditching PipedInputStream / PipedOutputStream in favour of something more suited to Minas needs would be a good solution to the problem.

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Comments

Work Log

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Repository	Revision	Date	User	Message
ASF	#349399	Mon Nov 28 08:28:41 UTC 2005	trustin	Resolved issue: ~~DIRMINA-129~~ "Pipe broken" IOExceptions countered on non-active stream connections * Replaced PipeI/OStream with a brand new IoSessionInputStream * Pulled ServiceOutputStream out to a new IoSessionOutputStream * Changed the default settings og HTTP server example in branches/0.8
				Files Changed
				MODIFY /directory/network/branches/0.8/src/java/org/apache/mina/io/handler/StreamIoHandler.java DEL /directory/network/trunk/src/java/org/apache/mina/handler/StreamIoHandler.java ADD /directory/network/trunk/src/java/org/apache/mina/handler/support/IoSessionInputStream.java ADD /directory/network/branches/0.8/src/java/org/apache/mina/io/handler/IoSessionInputStream.java ADD /directory/network/trunk/src/java/org/apache/mina/handler/support/IoSessionOutputStream.java ADD /directory/network/branches/0.8/src/java/org/apache/mina/io/handler/IoSessionOutputStream.java MODIFY /directory/network/branches/0.8/src/examples/org/apache/mina/examples/httpserver/Main.java ADD /directory/network/trunk/src/java/org/apache/mina/handler/support

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Trustin Lee added a comment - 28/Nov/05 02:57 PM

This issue affects 0.8, too. We need to fix it in 0.8.2.

Trustin Lee made changes - 28/Nov/05 02:57 PM

Field	Original Value	New Value
Fix Version/s		0.8.2 [ 12310630 ]

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Trustin Lee added a comment - 28/Nov/05 05:35 PM

I removed the use of PipedInput(Output)Stream in StreamIoHandler. Now, a brand-new and high-performing implementation replaces it. I tested a little bit with HTTP server example, and it seems to work great. Please confirm my fix and close this issue.

Thanks,
Trustin

Trustin Lee made changes - 28/Nov/05 05:35 PM

Status	Open [ 1 ]	Resolved [ 5 ]
Resolution		Fixed [ 1 ]

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dave irving added a comment - 07/Dec/05 06:03 PM

Fixed by Trustin

dave irving made changes - 07/Dec/05 06:03 PM

Status

Resolved [ 5 ]

Closed [ 6 ]