Illegal Character in Scheme Name When Setting Keystore Path


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When attempting to enable the SSL connector on Tomcat Server.xml file, the following appears in catalina.out during the startup:

SEVERE [main] Failed to load keystore type [JKS] with path [?C:\ConfluenceKeystore] due to [Illegal character in scheme name at index 0: ?C:\ConfluenceKeystore]
 java.lang.IllegalArgumentException: Illegal character in scheme name at index 0: ?C:\ConfluenceKeystore


The Keystore path contains a non-printable unicode character which does not appear when editing the server.xml file. Copying the line and testing for invisible characters returned this result:

On this example, the U+202A unicode character was inserted before the path which caused the issue. The OS interpreted that unicode character and it was invisible when editing the server.xml file. You can use a tool or website to check for invisible unicode characters like for example.


  • Open the server configuration file located here: <CONFLUENCE-INSTALL>/conf/server.xml. Make a backup copy of the file for precaution.
  • Check for any invisible character in the server.xml file and remove it. 

  • Save the server.xml file.

  • Restart Confluence to apply the changes.

最終更新日 2019 年 5 月 22 日


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