I have this logback configuration: <?xml version="1.0" encoding="UTF-8"?> <configuration debug="true" scan="true" scanPeriod="60 minutes"> <appender name="LOGOUTPUT" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${catalina.base}/logs/gateway_api.log</file> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>logFile.%d{yyyy-MM-dd}.log</FileNamePattern> </rollingPolicy> </appender> <appender name="STDOUTPUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <logger name="com.groupgti" level="DEBUG"/> <logger name="org.springframework" level="INFO"/> <logger name="org.apache.cxf" level="INFO"/> <root level="WARN"> <appender-ref ref="LOGOUTPUT"/> </root> </configuration> And these dependencies in my classpath: <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.10</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.7.10</version> <scope>compile</scope> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.2</version> <scope>compile</scope> </dependency> And I am seing a lot of these exception in my logs: 08:55:58,884 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Elapsed period: Wed Feb 25 08:55:45 GMT 2015 08:55:58,889 |-INFO in c.q.l.co.rolling.helper.RenameUtil - Renaming file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] to [logFile.2015-02-25.log] 08:55:58,891 |-WARN in c.q.l.co.rolling.helper.RenameUtil - Failed to rename file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] as [logFile.2015-02-25.log]. 08:55:58,892 |-ERROR in ch.qos.logback.core.rolling.RollingFileAppender[LOGOUTPUT] - Appender [LOGOUTPUT] failed to append. java.lang.NullPointerException at java.lang.NullPointerException at at ch.qos.logback.core.rolling.helper.FileStoreUtil.areOnSameFileStore(FileStoreUtil.java:44) at at ch.qos.logback.core.rolling.helper.RenameUtil.areOnDifferentVolumes(RenameUtil.java:97) at at ch.qos.logback.core.rolling.helper.RenameUtil.rename(RenameUtil.java:67) at at ch.qos.logback.core.rolling.TimeBasedRollingPolicy.rollover(TimeBasedRollingPolicy.java:153) at at ch.qos.logback.core.rolling.RollingFileAppender.attemptRollover(RollingFileAppender.java:158) at at ch.qos.logback.core.rolling.RollingFileAppender.rollover(RollingFileAppender.java:137) at at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:178) at at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:103) at at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88) at at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48) at at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273) at at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260) at at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442) at at ch.qos.logback.classic.Logger.filterAndLog_1(Logger.java:414) at at ch.qos.logback.classic.Logger.debug(Logger.java:507) at at com.groupgti.saml.handler.AssertionHandler.purgeRecords(AssertionHandler.java:95) at at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at at java.lang.reflect.Method.invoke(Method.java:483) at at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65) at at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) at at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at at java.lang.Thread.run(Thread.java:745) 08:55:58,944 |-ERROR in c.q.l.c.recovery.ResilientFileOutputStream@1011140840 - IO failure while writing to file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] java.io.IOException: Stream Closed at java.io.IOException: Stream Closed at at java.io.FileOutputStream.writeBytes(Native Method) at at java.io.FileOutputStream.write(FileOutputStream.java:315) at at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:79) at at ch.qos.logback.core.encoder.LayoutWrappingEncoder.doEncode(LayoutWrappingEncoder.java:137) at at ch.qos.logback.core.OutputStreamAppender.writeOut(OutputStreamAppender.java:194) at at ch.qos.logback.core.FileAppender.writeOut(FileAppender.java:209) at at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:219) at at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:182) at at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:103) at at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88) at at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48) at at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273) at at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260) at at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442) at at ch.qos.logback.classic.Logger.filterAndLog_1(Logger.java:414) at at ch.qos.logback.classic.Logger.error(Logger.java:547) at at com.groupgti.saml.handler.AssertionHandler.purgeRecords(AssertionHandler.java:103) at at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at at java.lang.reflect.Method.invoke(Method.java:483) at at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65) at at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) at at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at at java.lang.Thread.run(Thread.java:745) 10:07:37,098 |-INFO in c.q.l.c.recovery.ResilientFileOutputStream@1011140840 - Attempting to recover from IO failure on file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] 10:07:37,099 |-INFO in c.q.l.c.recovery.ResilientFileOutputStream@1011140840 - Recovered from IO failure on file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] 08:55:58,946 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Elapsed period: Thu Feb 26 08:55:58 GMT 2015 08:55:58,947 |-INFO in c.q.l.co.rolling.helper.RenameUtil - Renaming file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] to [logFile.2015-02-26.log] 08:55:58,947 |-WARN in c.q.l.co.rolling.helper.RenameUtil - Failed to rename file [/usr/share/apache-tomcat-8.0.18/logs/saml.log] as [logFile.2015-02-26.log]. 08:55:58,947 |-ERROR in ch.qos.logback.core.rolling.RollingFileAppender[LOGOUTPUT] - Appender [LOGOUTPUT] failed to append. java.lang.NullPointerException Any idea why? -- View this message in context: http://logback.10977.n7.nabble.com/java-lang-NullPointerException-from-Rolli... 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