Sean Kelley created NET-505:
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Summary: User specified bufferSize reset to default when FTPClient
is disconnected or reinitialized resulting in performance degradation
Key: NET-505
URL: https://issues.apache.org/jira/browse/NET-505
Project: Commons Net
Issue Type: Bug
Components: FTP
Affects Versions: 3.2
Reporter: Sean Kelley
Priority: Critical
The __bufferSize member variable is reset in the __initDefaults() method. This
method is called from the FTPClient's constructor, _connectAction_,
reinitialize, and disconnect. This can happen when the FTPClient is re-used
after the remote server closes a session due to a timeout, for example.
If the bufferSize is set by the user via the setBufferSize() method, the value
is lost when the buffer size is reset. Since the default buffer size controls
the amount read from the input stream and written to the output stream, and is
so low by default (1024B as defined by Util.DEFAULT_BUFFER_SIZE) the
performance of FTPClient drops dramatically.
The recommendation would be to initialize __bufferSize to zero when it is
declared and then remove the assignment in __initDefaults().
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