Balázs Gerner created NIFI-14156:
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Summary: Issue with nifi.cmd stop Command on Windows in Apache
NiFi 2.0/2.1
Key: NIFI-14156
URL: https://issues.apache.org/jira/browse/NIFI-14156
Project: Apache NiFi
Issue Type: Bug
Affects Versions: 2.1.0, 2.0.0
Reporter: Balázs Gerner
*Summary:*
The {{nifi.cmd stop}} command in Apache NiFi 2.0 and 2.1 fails to stop the
application on Windows, displaying an error:
{{org.apache.nifi.bootstrap.Command Application Process not running.}}
This issue appears to be specific to Windows platforms, as the same code
functions correctly on Linux and macOS.
*Steps to Reproduce:*
# Start Apache NiFi using the command: {{{}bin/nifi.cmd start{}}}.
# Attempt to stop it using the command: {{{}bin/nifi.cmd stop{}}}.
*Observed Behavior:*
The stop command fails with the error:
{{org.apache.nifi.bootstrap.Command Application Process not running.}}
*Technical Analysis:*
* *Root Cause:*
The issue originates from the
[{{{}StandardProcessHandleProvider{}}}#L73,|https://github.com/apache/nifi/blob/rel/nifi-2.0.0/nifi-bootstrap/src/main/java/org/apache/nifi/bootstrap/command/process/StandardProcessHandleProvider.java#L73]
where the application process arguments are expected but are found empty on
Windows. This prevents the application process handle from being identified.
* *Platform Dependency:*
This behavior appears to be linked to platform-specific limitations in the
Windows implementation of the {{ProcessHandle}} class. A potentially related
issue is described in JDK-8176725, which outlines platform-dependent
discrepancies in process argument handling.
* *Related Code Reference:*
The current {{ProcessHandleImpl}} implementation for Windows, which lacks
argument information support, can be found
[here|https://github.com/openjdk/jdk/blob/jdk-21%2B35/src/java.base/windows/native/libjava/ProcessHandleImpl_win.c].
*Tested Configurations:*
* *OS:* Windows Server 2025 (Version 24H2, OS Build 26100.2314).
* *JDKs:* Zulu 21 JDK and OpenJDK 21.
*Key Observations:*
# The behavior is specific to Windows. On Linux and macOS, the {{nifi.cmd
stop}} command functions as expected.
# The refactored runtime management in NiFi 2.0 eliminated reliance on lock
files and custom socket communication, but this introduced a gap in the stop
command functionality on Windows.
*Potential Solutions:*
* *Ideal:* JVM updates to address the limitations of {{ProcessHandle}} on
Windows.
* *Alternative:* Implement a workaround in NiFi for process management on
Windows.
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