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https://issues.apache.org/jira/browse/LOG4J2-1493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15409411#comment-15409411
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Mikael Ståldal commented on LOG4J2-1493:
----------------------------------------
Maybe the original reporter can confirm that the problem occurs with other
appenders than Kafka? And maybe also share some more information about the
environment (such as OS, JVM version, all entries on classpath).
> Cannot set all loggers as async when using JsonLayout
> -----------------------------------------------------
>
> Key: LOG4J2-1493
> URL: https://issues.apache.org/jira/browse/LOG4J2-1493
> Project: Log4j 2
> Issue Type: Bug
> Components: Layouts
> Affects Versions: 2.6.2
> Environment: all
> Reporter: Jose Leon
>
> When I set this property:
> {noformat}
> -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector
> {noformat}
> And use KafkaAppender like so:
> {code:xml}
> <?xml version="1.0" encoding="UTF-8" ?>
> <Configuration status="warn">
> <Appenders>
> <Kafka name="kafka" topic="${sys:kafka.topic}">
> <JsonLayout properties="true" locationInfo="true" complete="false"
> compact="true" />
> <Property name="bootstrap.servers">${sys:kafka.destinations}</Property>
> <Property name="hostname">${sys:hostname}</Property>
> <Property name="port">${sys:port}</Property>
> <Property name="instance">${sys:instance}</Property>
> </Kafka>
> </Appenders>
> <Loggers>
> <Logger name="org.apache.kafka" level="INFO" />
> <Root level="${sys:log.level}">
> <AppenderRef ref="kafka"/>
> </Root>
> </Loggers>
> </Configuration>
> {code}
> I get this stacktrace and no appenders work; with the goal being to get the
> KafkaAppender working at minimum
> {noformat}
> 2016-08-03 20:31:15,607 Log4j2-AsyncLogger[AsyncContext@764c12b6]1 ERROR
> com.fasterxml.jackson.databind.JsonMappingException: (was
> java.lang.NullPointerException) (through reference chain:
> org.apache.logging.log4j.core.async.RingBufferLogEvent["formattedMessage"])
> com.fasterxml.jackson.databind.JsonMappingException: (was
> java.lang.NullPointerException) (through reference chain:
> org.apache.logging.log4j.core.async.RingBufferLogEvent["formattedMessage"])
> at
> com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:210)
> at
> com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:177)
> at
> com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:190)
> at
> com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFieldsFiltered(BeanSerializerBase.java:724)
> at
> com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:154)
> at
> com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:129)
> at
> com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1052)
> at
> com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:905)
> at
> org.apache.logging.log4j.core.layout.AbstractJacksonLayout.toSerializable(AbstractJacksonLayout.java:83)
> at
> org.apache.logging.log4j.core.layout.JsonLayout.toSerializable(JsonLayout.java:937)
> at
> org.apache.logging.log4j.core.layout.AbstractJacksonLayout.toSerializable(AbstractJacksonLayout.java:63)
> at
> org.apache.logging.log4j.core.layout.JsonLayout.toSerializable(JsonLayout.java:801)
> at
> org.apache.logging.log4j.core.layout.AbstractJacksonLayout.toSerializable(AbstractJacksonLayout.java:33)
> at
> org.apache.logging.log4j.core.layout.AbstractStringLayout.toByteArray(AbstractStringLayout.java:253)
> at
> org.apache.logging.log4j.core.appender.mom.kafka.KafkaAppender.append(KafkaAppender.java:80)
> at
> org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:155)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:128)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:119)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:390)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:375)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:359)
> at
> org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:79)
> at
> org.apache.logging.log4j.core.async.AsyncLogger.actualAsyncLog(AsyncLogger.java:309)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEvent.execute(RingBufferLogEvent.java:149)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEventHandler.onEvent(RingBufferLogEventHandler.java:45)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEventHandler.onEvent(RingBufferLogEventHandler.java:29)
> at
> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException
> at
> org.apache.logging.log4j.core.async.RingBufferLogEvent.getFormattedMessage(RingBufferLogEvent.java:213)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:536)
> at
> com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter.serializeAsField(SimpleBeanPropertyFilter.j
> {noformat}
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