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https://issues.apache.org/jira/browse/LOG4J2-330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725963#comment-13725963
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Nick Williams commented on LOG4J2-330:
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Thanks. I'll get this in soon.
> NoSQLAppender cannot insert log event to MongoDB
> ------------------------------------------------
>
> Key: LOG4J2-330
> URL: https://issues.apache.org/jira/browse/LOG4J2-330
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-beta8
> Environment: JDK 1.7, Mongo Driver 2.11.2
> Reporter: Ruslan
>
> Seems like NoSQLAppender can't insert any log events to Mongo due to lack of
> serializer for Level enum.
> {quote}
> 2013-07-31 18:19:27,831 ERROR An exception occurred processing Appender
> databaseAppender java.lang.IllegalArgumentException: can't serialize class
> org.apache.logging.log4j.Level
> at org.bson.BasicBSONEncoder._putObjectField(BasicBSONEncoder.java:270)
> at org.bson.BasicBSONEncoder.putObject(BasicBSONEncoder.java:174)
> at org.bson.BasicBSONEncoder.putObject(BasicBSONEncoder.java:120)
> at com.mongodb.DefaultDBEncoder.writeObject(DefaultDBEncoder.java:27)
> at com.mongodb.OutMessage.putObject(OutMessage.java:289)
> at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:239)
> at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:204)
> at com.mongodb.DBCollection.insert(DBCollection.java:148)
> at com.mongodb.DBCollection.insert(DBCollection.java:91)
> at
> org.apache.logging.log4j.core.appender.db.nosql.mongo.MongoDBConnection.insertObject(MongoDBConnection.java:61)
> {quote}
> Here is my config
> {quote}
> <configuration status="WARN">
> <appenders>
> <NoSql name="databaseAppender" suppressExceptions="true">
> <MongoDb collectionName="applicationLog"
> factoryClassName="com.borsch.DBManager" factoryMethodName="getNewMongoClient"
> writeConcernConstant="NONE" username="root" password="qwe"/>
> </NoSql>
> </appenders>
> <loggers>
> <root level="error">
> <appender-ref ref="databaseAppender"/>
> </root>
> </loggers>
> </configuration>
> {quote}
> For now I used following workaround (code is in Scala)
> {quote}
> class LevelBSONEncoder extends org.bson.Transformer {
> def transform(o: Any): AnyRef =
> o match {
> case level: org.apache.logging.log4j.Level => new
> java.lang.Integer(level.intLevel())
> }
> }
> // which is used like this
> org.bson.BSON.addEncodingHook(org.apache.logging.log4j.Level.ERROR.getClass,
> new LevelBSONEncoder())
> {quote}
> I think it should be done in appender.
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