Github user blrunner commented on a diff in the pull request:
https://github.com/apache/tajo/pull/861#discussion_r44898585
--- Diff:
tajo-cli/src/main/java/org/apache/tajo/cli/tsql/commands/ExitCommand.java ---
@@ -37,6 +37,7 @@ public String getCommand() {
@Override
public void invoke(String[] cmd) throws Exception {
context.getOutput().println("bye!");
+ context.getOutput().flush();
--- End diff --
```flush()``` flushes content of buffer to destination. And you can write
something again into the stream. ```close()``` flushes content to destination
and closes the stream. After execute the command for terminating TSql, we will
never write anything anymore. Thus, we need to use ```close()``` instead of
```flush()```.
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