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List:       xmlrpc-user
Subject:    [jira] [Commented] (AXIOM-517) Random AXIOM stream errors: Attempted read on closed stream
From:       "Andreas Veithen (Jira)" <jira () apache ! org>
Date:       2023-07-01 12:53:00
Message-ID: JIRA.13530813.1680185732000.125031.1688215980038 () Atlassian ! JIRA
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    [ https://issues.apache.org/jira/browse/AXIOM-517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17739303#comment-17739303 \
] 

Andreas Veithen commented on AXIOM-517:
---------------------------------------

{{DetachableInputStream}} is designed so that the underlying stream can be safely \
closed *after* {{detach}} is called. If the underlying stream is closed before \
{{detach}} is called, then there is no way for {{DetachableInputStream}} to get the \
data that would otherwise have been returned by the underlying stream. So from \
Axiom's point of view, this is working as intended.

> Random AXIOM stream errors: Attempted read on closed stream
> -----------------------------------------------------------
> 
> Key: AXIOM-517
> URL: https://issues.apache.org/jira/browse/AXIOM-517
> Project: Axiom
> Issue Type: Bug
> Components: API
> Affects Versions: 1.4.0
> Reporter: Mohan Sri
> Priority: Major
> Labels: 1.4.0, AXIOM, AXIS2_1.8.2
> Attachments: TestDetachableInputStream.java
> 
> 
> While using AXIS 1.8.2 with the dependency of AXIOM 1.4.0, we see random stream \
> errors in Prod when under heavy load. This error terminates the AXIS request with a \
> fatal error. Here is the trace: 2023-03-28 17:20:55,732 (pool-4-thread-5) ERROR   \
> [Stub.497]: Error invoking query_info: java.io.IOException: {*}Attempted read on \
>                 closed stream{*}.
> org.apache.axiom.om.OMException: java.io.IOException: Attempted read on closed \
> stream. at org.apache.axiom.om.impl.common.factory.meta.DetachableInputStream.detach({*}DetachableInputStream.java:75{*}) \
> ~[axiom-1.4.0.jar:1.4.0] at \
> org.apache.axiom.om.impl.common.builder.OMXMLParserWrapperImpl.detach(OMXMLParserWrapperImpl.java:92) \
> ~[axiom-1.4.0.jar:1.4.0] at \
> org.apache.axis2.kernel.TransportUtils.detachInputStream(TransportUtils.java:578) \
> ~[axis2-kernel-1.8.2.jar:1.8.2] The issue appears to be that when \
> DetachableInputStream is created, it is passed the inputstream it doesn't own. So \
> an external thread could potentially close the stream before detach is called on \
> this instance. Attached is a driver the generates a stack trace similar to the one \
> we are seeing in production. Please run the driver to see the error and then modify \
> the driver to have: TEST_TYPE testType = DETACH_THEN_CLOSE;
> Recompile and run again to see the issue doesn't happen with this sequence of \
> detach and close.



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