log4j2: ERROR Appenders contains an invalid element or attribute "Sentry"

[leiless]

Platform:

• Java -> OpenJDK 1.8, Sentry for Java 5.0.1
• Log4j2 -> 2.14.1

IDE:

• IntelliJ -> 2021.1.3

Build system:

• Maven -> 3.6.3

Platform installed with:

• Maven Central

---

I have the following issue:

When I configurated Sentry for log4j2, I met the following error messages on app boot:

2021-07-27 16:22:01,304 main ERROR Appenders contains an invalid element or attribute "Sentry"
2021-07-27 16:22:01,311 main ERROR Unable to locate appender "Sentry" for logger config "foobar"

My configs

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn" packages="org.apache.logging.log4j.core,io.sentry.log4j2">
    <Properties>
        <Property name="basePath">/var/log/foobar-app</Property>
        <Property name="filename">system</Property>
    </Properties>

    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %p %C: %m%n"/>
        </Console>

        <RollingFile name="FileLogger"
                     fileName="${basePath}/${filename}.log"
                     filePattern="${basePath}/${filename}.%d{yyyy-MM-dd}.log.gz">
            <PatternLayout>
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %p %C: %m%n</pattern>
            </PatternLayout>
            <Policies>
                <SizeBasedTriggeringPolicy size="10MB"/>
            </Policies>
            <DefaultRolloverStrategy max="5"/>
        </RollingFile>

        <Sentry name="Sentry"/>
    </Appenders>

    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="FileLogger"/>
        </Root>
        <Logger name="foobar" level="DEBUG" additivity="false">
            <AppenderRef ref="Console"/>
            <AppenderRef ref="FileLogger"/>
            <AppenderRef ref="Sentry" level="WARN"/>
        </Logger>
    </Loggers>
</Configuration>

sentry.properties

dsn=https://6cfead8010c5c12200966a26cd9f62fd@sentry.my-company-domain.com/1
release=1.0
servername=dummy
stacktrace.app.packages=foobar
stacktrace.hidecommon=false
# Scale in milliseconds
timeout=10000
# In order to shutdown the buffer flushing thread gracefully, a ShutdownHook is created.
# Default shutdown time is 1000(milliseconds)
buffer.shutdowntimeout=5000

JVM startup options

java -Dlog4j.configurationFile=/home/lei/test-conf/log4j2.xml \
    -Dsentry.properties.file=/home/lei/test-conf/sentry.properties \
    ...

NOTE: my Java code has not explicitly import the io.sentry package in any form.

[leiless]

pom.xml snippet

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>

        <!-- ... -->
        <log4j-api.version>2.14.1</log4j-api.version>
        <log4j-core.version>2.14.1</log4j-core.version>
        <log4j-slf4j-impl.version>2.14.1</log4j-slf4j-impl.version>
        <sentry.version>5.0.1</sentry.version>
        <!-- ... -->
    </properties>

    <dependencies>
        <!-- ... -->

        <!-- SLF4J with Log4j2 -->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j-api.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j-core.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j-slf4j-impl.version}</version>
        </dependency>

        <dependency>
            <groupId>io.sentry</groupId>
            <artifactId>sentry</artifactId>
            <version>${sentry.version}</version>
        </dependency>

        <!-- ... -->
    </dependencies>

[leiless]

It turns out that I used wrong artifactId 🥲

diff --git a/pom.xml b/pom.xml
index 6d82b12..62183bd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -119,7 +119,7 @@
 
         <dependency>
             <groupId>io.sentry</groupId>
-            <artifactId>sentry</artifactId>
+            <artifactId>sentry-log4j2</artifactId>
             <version>${sentry.version}</version>
         </dependency>
     </dependencies>