Paul Kelly created NIFI-11542:
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Summary: RunNiFi's process detection and termination does not work
on Windows
Key: NIFI-11542
URL: https://issues.apache.org/jira/browse/NIFI-11542
Project: Apache NiFi
Issue Type: Bug
Affects Versions: 1.21.0
Environment: Windows
Reporter: Paul Kelly
Process detection and termination in
nifi-bootstrap/src/main/java/org/apache/nifi/bootstrap/RunNiFi.java rely on
running system commands ({{{}ps{}}} and {{{}kill{}}}) to determine if a process
is alive and to terminate lingering processes. The commands used do not exist
on Windows. Therefore, isProcessRunning always returns false and killing
lingering processes also fails. This can lead to the java.exe process sticking
around after NiFi is stopped.
Once Java 11 is the minimum, Java's ProcessHandle could be used instead of
running system commands, which would allow process detection and termination to
work on Windows the same way it does on other operating systems. Until then,
OS detection could be used to run Windows commands on Windows and POSIX
commands on everything else. For example, {{tasklist}} and {{taskkill}} could
be used.
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