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  1. MINA SSHD
  2. SSHD-768

Avoid unbounded message queueing when sending large amounts of data to slow clients

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      Our application runs an Apache MINA server to provide SSH support. We are seeing OutOfMemoryError s when certain clients establish a session with a large Window size. Particularly clients like TortoiseGit (which uses TortoisePlink which in turn seems to use Putty) use an initial window size of 2GB. From heap dumps we can see that the DefaultWriteRequestQueue is filling up with WriteRequest instances and taking up gigabytes of space until the heap blows.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. SSHD-770 Add configurable automatic channel output stream throttling control

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open
          relates to

          Bug - A problem which impairs or prevents the functions of the product. SSHD-754 OOM in sending data for channel

          • Major - Major loss of function.
          • Resolved

          New Feature - A new feature of the product, which has yet to be developed. SSHD-1080 Rework the PacketWriter to split according to the various semantics

          • Major - Major loss of function.
          • Resolved

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              lgoldstein Lyor Goldstein
              jpalacios jpalacios
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