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Permission denied error from java.io.File.createTempFile

Last update: Tue Nov 21 2023 00:00:00 GMT+0000 (Coordinated Universal Time)

If you get a permission-denied error from java.io.File.createTempFile, find out if the JVM parameter -Djava.io.tmpdir is set on the java process. If you didn’t find a java.io.tmpdir parameter, then grant the user access to the default OS temp directory.

Description description

Environment

Adobe Experience Manager (AEM) (all versions)

Issue/Symptoms

An error occurs in the error.log that reports java.io.IOException: Permission denied and the stack trace has java.io.File.createTempFile in it.

01.06.2017 16:34:02.631 *ERROR* [ qtp1085110594-4453]  org.apache.felix.http.jetty Exception while processing request to /system/console/configMgr/com.adobe.cq.experiencelog.impl.ExperienceLogConfigServlet (java.io.IOException: Permission denied)

java.io.IOException: Permission denied

        at java.io.UnixFileSystem.createFileExclusively(Native Method)

        at java.io.File.createTempFile(File.java:2024)

        at org.apache.felix.cm.file.FilePersistenceManager._store(FilePersistenceManager.java:699)

        at org.apache.felix.cm.file.FilePersistenceManager.store(FilePersistenceManager.java:660)

        at org.apache.felix.cm.impl.CachingPersistenceManagerProxy.store(CachingPersistenceManagerProxy.java:242)

        at org.apache.felix.cm.impl.ConfigurationImpl.storeNewConfiguration(ConfigurationImpl.java:462)

        at org.apache.felix.cm.impl.ConfigurationImpl.<init>(ConfigurationImpl.java:183)

Resolution resolution

Find out if the JVM parameter -Djava.io.tmpdir is set on the java process.

On Linux:

  1. Run this command:

    code language-none 
    ps -ef | grep java

  2. Review the JVM parameters searching for -Djava.io.tmpdir

On Windows, Linux, or Unix:

  1. Go to https://aem-host:aem-port/system/console/jmx/java.lang%3Atype%3DRuntime

  2. Search for java.io.tmpdir on the page.

  3. Copy the value of java.io.tmpdir to the clipboard.

  4. Go to that path on the Operating System and grant the user that owns the java process full read/write access to that folder.

  5. If you didn’t find a java.io.tmpdirparameter, then grant the user access to the default OS temp directory.

    • In Linux and Unix, this directory is /tmp by default.
    • In Windows, the directory is under the user’s home directory (for example: C:\Users\aemuser\AppData\Local\Temp).

Cause

The user that owns the AEM java process doesn’t have proper permissions to write in the java process’ temp directory.

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