bamaer opened a new issue, #2927:
URL: https://github.com/apache/hop/issues/2927
### Apache Hop version?
SNAPSHOT-20230513
### Java version?
openjdk version "11.0.18" 2023-01-17
### Operating system
Linux
### What happened?
NPE when Enhanced JSON Output is configured to write to a file and receives
an empty stream.
This issue does not occur when only "Output value" is selected.
```
org.apache.hop.core.exception.HopTransformException:
Error writing to file!
at java.lang.Thread.run (Thread.java:829)
at org.apache.hop.pipeline.transform.RunThread.run (RunThread.java:55)
at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.processRow
(JsonOutput.java:111)
at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.writeJsonFile
(JsonOutput.java:331)
at java.io.Writer.write (Writer.java:249)
at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.writeJsonFile(JsonOutput.java:333)
at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.processRow(JsonOutput.java:111)
at org.apache.hop.pipeline.transform.RunThread.run(RunThread.java:55)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.NullPointerException
at java.base/java.io.Writer.write(Writer.java:249)
at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.writeJsonFile(JsonOutput.java:331)
... 3 more
2023/05/13 09:05:39 - Enhanced JSON Output.0 - ERROR: Unexpected error
2023/05/13 09:05:39 - Enhanced JSON Output.0 - ERROR:
org.apache.hop.core.exception.HopTransformException:
2023/05/13 09:05:39 - Enhanced JSON Output.0 - Error writing to file!
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at java.lang.Thread.run
(Thread.java:829)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transform.RunThread.run (RunThread.java:55)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.processRow
(JsonOutput.java:111)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.writeJsonFile
(JsonOutput.java:331)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at java.io.Writer.write
(Writer.java:249)
2023/05/13 09:05:39 - Enhanced JSON Output.0 -
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.writeJsonFile(JsonOutput.java:333)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.processRow(JsonOutput.java:111)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transform.RunThread.run(RunThread.java:55)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
java.base/java.lang.Thread.run(Thread.java:829)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - Caused by:
java.lang.NullPointerException
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
java.base/java.io.Writer.write(Writer.java:249)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - at
org.apache.hop.pipeline.transforms.jsonoutputenhanced.JsonOutput.writeJsonFile(JsonOutput.java:331)
2023/05/13 09:05:39 - Enhanced JSON Output.0 - ... 3 more
2023/05/13 09:05:39 - Enhanced JSON Output.0 - Finished processing (I=0,
O=0, R=0, W=0, U=0, E=1)
```
### Issue Priority
Priority: 2
### Issue Component
Component: Transforms
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