sanova opened a new issue, #2162:
URL: https://github.com/apache/logging-log4j2/issues/2162
## Description
I’m trying to set up a log reader using JsonLayout.
Everything is fine even using the JsonTemplateLayout class and replicating
the JsonLayout json structure and removing unnecessary properties.
However, if the log has a stackTrace, the string is not parsed. The same
problem occurs even when using JsonLayout directly, both with stringified
stackTrace and without.
## Configuration
appender.filejson.layout.type = JsonLayout
appender.filejson.layout.compact = true
appender.filejson.layout.eventEol = true
appender.filejson.layout.complete = false
appender.filejson.layout.properties = false
appender.filejson.layout.propertiesAsList = false
appender.filejson.layout.locationInfo = true
appender.filejson.layout.includeStacktrace = true
appender.filejson.layout.stacktraceAsString = true
appender.filejson.layout.includeNullDelimiter = false
appender.filejson.layout.objectMessageAsJsonObject = true
**Version:** [Log4j version]
Version: 2.20.0
**Operating system:** [OS and version]
Debian 10
**JDK:** [JDK distribution and version]
java version "1.8.0_221
## Logs
Caused by: java.lang.IllegalArgumentException: argument "content" is null
at
[email protected]//com.fasterxml.jackson.databind.ObjectReader._assertNotNull(ObjectReader.java:2366)
at
[email protected]//com.fasterxml.jackson.databind.ObjectReader.createParser(ObjectReader.java:1099)
at
[email protected]//com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1491)
at
deployment.basiccore.war//org.apache.logging.log4j.core.parser.AbstractJacksonLogEventParser.parseFrom(AbstractJacksonLogEventParser.java:38)
at
deployment.basiccore.war//org.apache.logging.log4j.core.parser.JsonLogEventParser.parseFrom(JsonLogEventParser.java:25)
at
deployment.basiccore.war//it.siag.basiccore.logs.LogManager.getLogByDates(LogManager.java:100)
... 203 more
## Reproduction
Example json log string:
```
{
"instant": {
"epochSecond": 1704362220,
"nanoOfSecond": 253185000
},
"thread": "default task-1",
"level": "DEBUG",
"loggerName": "it.siag.basiccore.logs.LogManager",
"message": "Error retrieving log.. ",
"thrown": {
"commonElementCount": 0,
"name": "java.lang.NullPointerException",
"extendedStackTrace": [
{
"class": "it.siag.basiccore.logs.LogManager",
"method": "getLastLogRows",
"file": "LogManager.java",
"line": 63,
"exact": false,
"location": "classes",
"version": "?"
},
<.............>
<.............>.
{
"class": "java.lang.Thread",
"method": "run",
"file": "Thread.java",
"line": 834,
"exact": true,
"location": "?",
"version": "?"
}
]
},
"endOfBatch": false,
"loggerFqcn": "org.apache.logging.log4j.spi.AbstractLogger",
"threadId": 150,
"threadPriority": 5,
"source": {
"class": "it.siag.basiccore.logs.LogManager",
"method": "getLastLogRows",
"file": "LogManager.java",
"line": 72,
"classLoaderName": "deployment.basiccore.war"
}
}
```
Code to parse line:
```
JsonLogEventParser parser = new JsonLogEventParser();
try (BufferedReader br = new BufferedReader(new FileReader(logFilePath))) {
while (br.readLine() != null) {
// Get LOG Event from line
try {
LogEvent logEvent = parser.parseFrom(br.readLine());
.....
}
catch(Exception x) {
System.out.print("Error parsing log");
throw x;
}
}
}
catch(Exception e) {
System.out.println(e.getStackTrace().toString());
throw new RuntimeException(e);
}
```
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