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https://issues.apache.org/jira/browse/CXF-9258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18128221#comment-18128221
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Freeman Yue Fang commented on CXF-9258:
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A reproducer project added to reproduce this problem
> WS-RM retransmission of messages with attachments (SwA/MTOM) sends an invalid
> multipart request
> -----------------------------------------------------------------------------------------------
>
> Key: CXF-9258
> URL: https://issues.apache.org/jira/browse/CXF-9258
> Project: CXF
> Issue Type: Bug
> Components: WS-* Components
> Affects Versions: 4.1.9, 4.2.4, 3.6.13
> Reporter: Freeman Yue Fang
> Assignee: Freeman Yue Fang
> Priority: Major
> Attachments: wsrm-retransmission-attachments-reproducer.zip
>
>
> When a WS-RM application message with attachments (SwA or MTOM) is
> retransmitted from the in-memory retransmission queue, the retransmitted
> request is invalid. The server fails with:
> {noformat}
> org.apache.cxf.interceptor.Fault: Couldn't find MIME boundary: --uuid:...
> at
> org.apache.cxf.interceptor.AttachmentInInterceptor.handleMessage(AttachmentInInterceptor.java:60)
> {noformat}
> so the message is never delivered, although it is retransmitted until the
> retransmission limit.
> h3. Cause
> {{RetransmissionQueueImpl.doResend()}} reuses the original message and runs
> its interceptor chain again, starting after {{RMCaptureOutInterceptor}}. Two
> message properties left over from the first transmission break the attachment
> handling:
> # {{AttachmentOutInterceptor}} sets {{ATTACHMENT_OUT_CHECKED}} on the message
> to avoid being invoked twice (added by CXF-7952 in 3.3.6/3.4.0). On the
> retransmission, the flag is still set, so the interceptor does nothing: the
> request is sent with the multipart Content-Type of the first transmission,
> but its body is the bare SOAP envelope, without the MIME parts and the
> attachments.
> # {{AttachmentSerializer.writeProlog()}} replaces {{Message.CONTENT_TYPE}}
> (e.g. {{text/xml}}) with the multipart Content-Type, and uses
> {{Message.CONTENT_TYPE}} as the type of the root part. On the retransmission,
> it uses the multipart Content-Type of the first transmission instead, so the
> {{type}}/{{start-info}} parameters and the Content-Type of the root part
> contain the previous multipart Content-Type, including its boundary, e.g.:
> {noformat}
> multipart/related; type="multipart/related"; boundary="uuid:c331e22c-...";
> start="<[email protected]>"; start-info="multipart/related;
> type=\"text/xml\"; boundary=\"uuid:6a734010-...\";
> start=\"<[email protected]>\"; start-info=\"text/xml\""
> {noformat}
> h3. How to reproduce
> Send a one-way message with a SwA attachment (or with MTOM enabled) through a
> WS-RM client, and lose the first transmission (e.g. with the
> {{MessageLossSimulator}} of the ws-rm systests), so that the server only
> receives the retransmission.
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