TerraNibble commented on issue #427:
URL: https://github.com/apache/mina-sshd/issues/427#issuecomment-1934985712
This is also easily reproducible using the including unit test
`ScpTest.testStreamsUploadAndDownload`. Running it you can observe the 5 second
exit timeout being hit.
Moving the `handleCommandExitStatus` to after the I/O stream
try-with-resources resolves the timeout but introduces a new race-condition
with the channels not shutting down gracefully.
I am still not sure why only `upload` is susceptible to this and not
`runUpload` based on their slightly different use of the `ScpHelper`.
You can simulate the issue by introducing a 200ms delay between the IO
streams and the channel closing. Hopefully this information is helpful.
```
ClientSession session = getClientSession();
ChannelExec channel = openCommandChannel(session, cmd);
try {
try (InputStream invOut = channel.getInvertedOut();
OutputStream invIn = channel.getInvertedIn()) {
// NOTE: we use a mock file system since we expect no
invocations for it
ScpHelper helper = new ScpHelper(session, invOut, invIn, new
MockFileSystem(remote), opener, listener);
Path mockPath = new MockPath(remote);
helper.sendStream(new DefaultScpStreamResolver(name,
mockPath, perms, time, size, local, cmd),
options.contains(Option.PreserveAttributes),
ScpHelper.DEFAULT_SEND_BUFFER_SIZE);
// handleCommandExitStatus(cmd, channel);
}
Thread.sleep(200);
// handleCommandExitStatus(cmd, channel);
} catch (InterruptedException e) {
throw new RuntimeException(e);
} finally {
channel.close(false);
}
```
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