Rule Set:<rule ref="rulesets/java/logging-java.xml/InvalidSlf4jMessageFormat"/>
Description:
The following error is printed:
Exception applying rule InvalidSlf4jMessageFormat on file [...]/LoggerHelper.java, continuing with next rule
java.lang.NullPointerException
at net.sourceforge.pmd.lang.java.rule.logging.InvalidSlf4jMessageFormatRule.expectedArguments(InvalidSlf4jMessageFormatRule.java:161)
at net.sourceforge.pmd.lang.java.rule.logging.InvalidSlf4jMessageFormatRule.visit(InvalidSlf4jMessageFormatRule.java:76)
at net.sourceforge.pmd.lang.java.ast.ASTName.jjtAccept(ASTName.java:35)
at net.sourceforge.pmd.lang.java.ast.AbstractJavaNode.childrenAccept(AbstractJavaNode.java:56)
at net.sourceforge.pmd.lang.java.rule.AbstractJavaRule.visit(AbstractJavaRule.java:75)
at net.sourceforge.pmd.lang.java.rule.AbstractJavaRule.visit(AbstractJavaRule.java:380)
at net.sourceforge.pmd.lang.java.ast.ASTPrimaryPrefix.jjtAccept(ASTPrimaryPrefix.java:42)
at net.sourceforge.pmd.lang.java.ast.AbstractJavaNode.childrenAccept(AbstractJavaNode.java:56)
at net.sourceforge.pmd.lang.java.rule.AbstractJavaRule.visit(AbstractJavaRule.java:75)
at net.sourceforge.pmd.lang.java.rule.AbstractJavaRule.visit(AbstractJavaRule.java:376)
at net.sourceforge.pmd.lang.java.ast.ASTPrimaryExpression.jjtAccept(ASTPrimaryExpression.java:21)
Code Sample demonstrating the issue:
public class LoggerHelper {
public LoggerHelper(int entriesCount, long sleepingInterval, String loggerName, String message) {
Logger logger = LoggerFactory.getLogger(loggerName);
for (int i = 0; i < entriesCount; i++) {
logger.info(message);
try {
Thread.sleep(sleepingInterval);
}
catch(InterruptedException e) {
// nothing to do here!
}
}
}
public static void main(String[] args) {
if (args.length != 4) {
System.err.println("Invalid command line parameters ...");
System.out.println("USAGE: LoggerHelper <count of log entries> <sleeping interval> <logger-name> <message>");
System.exit(-1);
}
int entriesCount = Integer.parseInt(args[0]);
long sleepingInterval = Long.parseLong(args[1]);
String loggerName = args[2];
String logMessage = args[3];
new LoggerHelper(entriesCount, sleepingInterval, loggerName, logMessage);
}
}
Running PMD through: Gradle
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