Error setFile null false call failed when using log4j

Question

I have added log4j properties file in source folder of project but I am still getting a log4j error   Here is my Log4j properties file        rootCategory DEBUG  R  O       Stdout     log4j appender O org apache log4j ConsoleAppender     log4j appender O log44j log       File     log4j appender R org apache log4j RollingFileAppender     log4j appender R File log4j log        Control the maximum log file size     log4j appender R MaxFileSize 100KB        Archive log files  one backup file here      log4j appender R MaxBackupIndex 1      log4j appender R layout org apache log4j PatternLayout     log4j appender O layout org apache log4j PatternLayout      log4j appender R layout ConversionPattern   d ISO8601   5p 6 6r  t  x -  C  M  F  L  -  m n     log4j appender O layout ConversionPattern   d ISO8601   5p 6 6r  t  x -  C  M  F  L  -  m n        Define the root logger with appender file     logDir      logs     log4j rootLogger   DEBUG  FILE        Define the file appender     log4j appender FILE org apache log4j FileAppender     log4j appender FILE File logs   file name      log4j appender FILE Append false        Define the layout for file appender     log4j appender FILE layout org apache log4j PatternLayout     log4j appender FILE layout conversionPattern  d ABSOLUTE   5p  c 1   L -  m n      log4j appender CONSOLE layout org apache log4j PatternLayout   Here is the Java exception that I am getting   log4j ERROR setFile null false  call failed  java io FileNotFoundException  logs  Access is denied      at java io FileOutputStream open Native Method      at java io FileOutputStream  lt init gt  FileOutputStream java 194      at java io FileOutputStream  lt init gt  FileOutputStream java 116      at org apache log4j FileAppender setFile FileAppender java 294      at org apache log4j FileAppender activateOptions FileAppender java 165      at org apache log4j config PropertySetter activate PropertySetter java 307      at org apache log4j config PropertySetter setProperties PropertySetter java 172      at org apache log4j config PropertySetter setProperties PropertySetter java 104      at org apache log4j PropertyConfigurator parseAppender PropertyConfigurator java 809      at org apache log4j PropertyConfigurator parseCategory PropertyConfigurator java 735      at org apache log4j PropertyConfigurator configureRootCategory PropertyConfigurator java 615      at org apache log4j PropertyConfigurator doConfigure PropertyConfigurator java 502      at org apache log4j PropertyConfigurator doConfigure PropertyConfigurator java 547      at org apache log4j helpers OptionConverter selectAndConfigure OptionConverter java 483      at org apache log4j LogManager  lt clinit gt  LogManager java 127      at org apache log4j Logger getLogger Logger java 104      at lib Dashboard Reports  lt init gt  Reports java 34      at testcases AmazonDashboard TC DB17 main TC DB17 java 54  AmazonDashboardTC DB17Exception in thread  main  java lang NullPointerException     at testcases AmazonDashboard TC DB17 main TC DB17 java 131    Please let me know  how to resolve this exception  as I have tried placing my properties file in root folder and now I have placed in source folder but in both cases I got the above exception

User · Answer

Have a look at the error -  log4j ERROR setFile null false  call failed  java io FileNotFoundException  logs  Access is denied    It seems there s a log file named as  logs  to which access is denied i e it is not having sufficient permissions to write logs  Try by giving write permissions to the  logs  log file  Hope it helps

User · Answer

I had the exact same problem  Here is the solution that worked for me  simply put your properties file path in the cmd line this way    -Dlog4j configuration  lt FILE PATH gt    ex  log4j properties    Hope this will help you

User · Answer

Try executing your command with sudo Super User   this worked for me     Run     sudo your command  After than enter the super user password  Thats All

User · Answer

This is your config    log4j appender FILE File logs   file name    And this error happened    java io FileNotFoundException  logs  Access is denied    So it seems that the variable file name is not set  and java tries to write to the directory logs     You can force the value of your variable   file name  calling maven with this option -D    mvn clean test -Dfile name logfile log

User · Answer

i just add write permission to  logs  folder and it works for me

User · Answer

I suspect that the variable   file name  is not substituted correctly  As a result  the value of log4j appender FILE File becomes logs   As such  Java tries to create a log file named logs   but probably it is an existing directory  so you get the exception   As a quick remedy  change the log4j appender FILE File setting to point to file by absolute path  for example  tmp mytest log  You should not get an exception   After that you can proceed to debugging why   file name  is not replaced correctly in your runtime environment

User · Answer

if it is window7 like mine   without administrative rights cannot write a file at C  drive  just give another folder in log4j properties file     Set the name of the file   log4j appender FILE File C  server log out you can see with notepad

User · Answer

To prevent this isue I changed all values in log4j properties file with directory   kafka logs dir  to my own directory  For example D  temp

User · Answer

this error is coming because of appender file location you have provided is not reachable with current user access   Quick Solution  change the log4j appender FILE File setting to point to file using absolute path which location is reachable to the current user you have logged in  for example  tmp myapp log  Now You should not get an error

User · Answer

Please changes your log file location to another drive  it will work   this happen s the permission of creating log file

[java] Error: "setFile(null,false) call failed" when using log4j

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