Gary D. Gregory created LOG4J2-2812:
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Summary: Use a message for an NPE in the JDBC Appender
Key: LOG4J2-2812
URL: https://issues.apache.org/jira/browse/LOG4J2-2812
Project: Log4j 2
Issue Type: Improvement
Components: Appenders, JDBC
Reporter: Gary D. Gregory
Assignee: Gary D. Gregory
A configuration error can lead to a mysterious NPE:
{noformat}
java.lang.NullPointerException
at
org.apache.logging.log4j.core.appender.db.jdbc.JdbcDatabaseManager.setStatementObject(JdbcDatabaseManager.java:753)
at
org.apache.logging.log4j.core.appender.db.jdbc.JdbcDatabaseManager.setFields(JdbcDatabaseManager.java:739)
at
org.apache.logging.log4j.core.appender.db.jdbc.JdbcDatabaseManager.writeInternal(JdbcDatabaseManager.java:804)
at
org.apache.logging.log4j.core.appender.db.jdbc.JdbcDatabaseManager.writeThrough(JdbcDatabaseManager.java:880)
at
org.apache.logging.log4j.core.appender.db.AbstractDatabaseManager.write(AbstractDatabaseManager.java:264)
at
org.apache.logging.log4j.core.appender.db.AbstractDatabaseAppender.append(AbstractDatabaseAppender.java:110)
at
org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)
at
org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)
at
org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)
at
org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
at
org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:543)
at
org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:502)
at
org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:485)
at
org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:460)
at
org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82)
at org.apache.logging.log4j.core.Logger.log(Logger.java:161)
at
org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2198)
at
org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2152)
at
org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2135)
at
org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1836)
at
org.apache.logging.log4j.spi.AbstractLogger.info(AbstractLogger.java:1290)
{noformat}
Let's say what is null (the statement) instead of a plain NPE.
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