chaturvedakanksha opened a new issue, #4677:
URL: https://github.com/apache/hop/issues/4677
### Apache Hop version?
2.7.0
### Java version?
22.0.2
### Operating system
Windows
### What happened?
When invoking the hop/registerPipeline REST API with the payload provided
below, the API throws a NullPointerException if the log_file flag is set to Y
and a log_filename is specified.
The specified log file gets created in the container, but the exception
occurs afterward, halting further execution.
Error Details:
Exception Message:
java.lang.NullPointerException
at
java.base/java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
at
java.base/java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006)
at
org.apache.hop.core.logging.LoggingRegistry.registerLogChannelFileWriterBuffer(LoggingRegistry.java:261)
at
org.apache.hop.core.logging.LogChannelFileWriter.<init>(LogChannelFileWriter.java:74)
at
org.apache.hop.core.logging.LogChannelFileWriter.<init>(LogChannelFileWriter.java:87)
at
org.apache.hop.www.BaseWorkflowServlet.createPipeline(BaseWorkflowServlet.java:146)
at
org.apache.hop.www.RegisterPipelineServlet.generateBody(RegisterPipelineServlet.java:56)
Steps to Reproduce:
1. Start the Apache Hop server using the provided Docker script:
docker run -it --rm \
--env HOP_SERVER_USER=admin \
--env HOP_SERVER_PASS=admin \
--env HOP_SERVER_SHUTDOWNPORT=8080 \
--env HOP_SERVER_PORT=8181 \
--env HOP_SERVER_HOSTNAME=0.0.0.0 \
-p 8080:8080 \
-p 8181:8181 \
--name my-hop-server-container \
apache/hop:2.7.0
2. Make a POST request to hop/registerPipeline REST API with the following
payload:
<pipeline_configuration>
...
<log_file>Y</log_file>
<log_filename>/tmp/generateRowsLog.log</log_filename>
...
</pipeline_configuration>
3. Observe that the log file is created inside the container, but a
NullPointerException is thrown during the pipeline registration process.
Attached full xml payload
[payload.txt](https://github.com/user-attachments/files/18037540/payload.txt)
**Expected Behavior**:
The pipeline should register successfully, and logs should be written to the
specified file without errors.
### Issue Priority
Priority: 3
### Issue Component
Component: Hop Server
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