[LOG4J2-331] “ERROR Failed to write log event to MongoDB due to invalid result [0]” when using NoSQLAppender

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-beta8
• Fix Version/s: 2.0-beta9
• Component/s: Appenders

Environment

JDK 1.7, Mongo Driver 2.11.2

• Assignee: Nick Williams
• Reporter: expert
• Created: 01/Aug/13 02:07
• Updated: 02/Aug/13 03:13
• Resolved: 02/Aug/13 03:13

Description

I get following message

ERROR Failed to write log event to MongoDB due to invalid result [0]

when using NoSQLAppender with log4j2 v2.0-beta8 but log event gets written to MongoDB.

Here is my config

<?xml version="1.0" encoding="UTF-8"?>
<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>

What's even more strange I can't find the code that generates it. I didn't find such string in sources of log4j2.