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https://issues.apache.org/jira/browse/THRIFT-5515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jens Geyer resolved THRIFT-5515.
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Fix Version/s: 0.17.0
Assignee: Tamas Kovacs
Resolution: Fixed
> Oneway requests can stuck in TNonblockingServer with TSSLSocket
> ---------------------------------------------------------------
>
> Key: THRIFT-5515
> URL: https://issues.apache.org/jira/browse/THRIFT-5515
> Project: Thrift
> Issue Type: Bug
> Components: C++ - Library
> Affects Versions: 0.15.0
> Environment: thrift: 0.15.0
> openssl: 1.0.2k
> libevent: 2.0.21-stable method epoll
>
> Reporter: Tamas Kovacs
> Assignee: Tamas Kovacs
> Priority: Major
> Fix For: 0.17.0
>
> Attachments: test.zip
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> C++ TNonblockingServer processes the requests one by one. The processing of
> one request starts when an event for the given socket is triggered by
> libevent.
> If TSSLSocket used, the openssl library may read all the available data from
> the socket which potentially contain more requests.
> The first request is processed by TNonblockingServer::workSocket.
> But after that since only oneway requests are used no send happens and the
> socket receive buffer is already empty, so no any event is triggered by
> libevent.
> This means the processing of the further request already buffered by openssl
> will happen only when a new request arrives to the socket.
> There is a little test client/server attached to show the problem. The output
> from server_rpcgw is the following:
> 17:23:35 message1
> 17:23:37 message2
> 17:23:37 message3
> The message2 was sent by the client at the same time like message1, but got
> processed by the server just when the message3 arrived.
> In the attached wireshark capture the frame #10 contains the message1 and
> message2 the #12 contains the message3.
> In the code there is already a comment about this case after the thrift frame
> size is read:
> https://github.com/apache/thrift/blob/0b29261a4f3c6882ef3b09aae47914f0012b0472/lib/cpp/src/thrift/server/TNonblockingServer.cpp#L480
> It is not clear why no similar check happens after the thrift frame content
> is read.
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