Neo4j-Log4j2 Sample

Reproduction case for broken log4j2 integration with Neo4j 4.2.x (Issue neo4j/neo4j#12655). Note: JAVA_HOME has to point to a JDK 11 installation.

Case 1: Logging works with Neo4j 4.1.5

Run test:

./mvnw clean test -Dneo4j.version='4.1.5'

Output:

[INFO] Running com.example.neo4j.log4j2.LoggingTest
[main] INFO  com.example.neo4j.log4j2.LoggingTest - Hello World.
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.805 s - in com.example.neo4j.log4j2.LoggingTest

Case 2: Logging broken with Neo4j 4.2.2

Run test:

./mvnw clean test -Dneo4j.version='4.2.2'

Output:

[INFO] Running com.example.neo4j.log4j2.LoggingTest
ERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at position 56 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at position 56 in conversion pattern.
[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.374 s <<< FAILURE! - in com.example.neo4j.log4j2.LoggingTest
[ERROR] logMessageShouldBePrintedToConsole  Time elapsed: 0.37 s  <<< FAILURE!
org.opentest4j.AssertionFailedError:
expected: <[main] INFO  com.example.neo4j.log4j2.LoggingTest - Hello World.
> but was: <>
        at com.example.neo4j.log4j2.LoggingTest.logMessageShouldBePrintedToConsole(LoggingTest.java:45)