garydgregory opened a new issue, #3006:
URL: https://github.com/apache/logging-log4j2/issues/3006
## Description
SyslogAppenderCustomLayoutTest is unreliable
```
[ERROR] Failures:
[ERROR]
SyslogAppenderCustomLayoutTest>SyslogAppenderTest.testTCPAppender:56->SyslogAppenderTestBase.sendAndCheckLegacyBsdMessage:74->SyslogAppenderTestBase.checkTheNumberOfSentAndReceivedMessages:112
The number of received messages should be equal with the number of sent
messages expected:<1> but was:<0>
[ERROR]
SyslogAppenderCustomLayoutTest>SyslogAppenderTest.testUDPAppender:79->SyslogAppenderTestBase.sendAndCheckLegacyBsdMessage:74->SyslogAppenderTestBase.checkTheNumberOfSentAndReceivedMessages:112
The number of received messages should be equal with the number of sent
messages expected:<1> but was:<0>
```
## Configuration
**Version:** 2.x at 01125b11a7c52af12204a1c4a646158f63b2d6eb
**Operating system:**
Microsoft Windows [Version 10.0.19045.4780
**JDK:**
Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937)
Maven home: C:\java\apache-maven-3.9.9
Java version: 17.0.12, vendor: Eclipse Adoptium, runtime: C:\Program
Files\Eclipse Adoptium\jdk-17.0.12.7-hotspot
Default locale: en_US, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
## Logs
```
[ERROR] Tests run: 5, Failures: 2, Errors: 0, Skipped: 0, Time elapsed:
3.549 s <<< FAILURE! -- in
org.apache.logging.log4j.core.appender.SyslogAppenderCustomLayoutTest
[INFO] Running org.apache.logging.log4j.core.appender.SmtpAppenderAsyncTest
10:07:11.688 main ERROR The pattern, literal, and isEventTimestamp
attributes are mutually exclusive.
[ERROR]
org.apache.logging.log4j.core.appender.SyslogAppenderCustomLayoutTest.testTCPAppender
-- Time elapsed: 0.225 s <<< FAILURE!
java.lang.AssertionError: The number of received messages should be equal
with the number of sent messages expected:<1> but was:<0>
at
org.apache.logging.log4j.core.appender.SyslogAppenderTestBase.checkTheNumberOfSentAndReceivedMessages(SyslogAppenderTestBase.java:112)
at
org.apache.logging.log4j.core.appender.SyslogAppenderTestBase.sendAndCheckLegacyBsdMessage(SyslogAppenderTestBase.java:74)
at
org.apache.logging.log4j.core.appender.SyslogAppenderTest.testTCPAppender(SyslogAppenderTest.java:56)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
[ERROR]
org.apache.logging.log4j.core.appender.SyslogAppenderCustomLayoutTest.testUDPAppender
-- Time elapsed: 0.209 s <<< FAILURE!
java.lang.AssertionError: The number of received messages should be equal
with the number of sent messages expected:<1> but was:<0>
at
org.apache.logging.log4j.core.appender.SyslogAppenderTestBase.checkTheNumberOfSentAndReceivedMessages(SyslogAppenderTestBase.java:112)
at
org.apache.logging.log4j.core.appender.SyslogAppenderTestBase.sendAndCheckLegacyBsdMessage(SyslogAppenderTestBase.java:74)
at
org.apache.logging.log4j.core.appender.SyslogAppenderTest.testUDPAppender(SyslogAppenderTest.java:79)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
```
## Reproduction
```
mvn clean install
```
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