[jira] [Created] (VFS-833) org.apache.commons.vfs2.FileSystemOptions#options is not synchronized

["Kannan Ramamoorthy (Jira)" <ji...@apache.org>]

Kannan Ramamoorthy created VFS-833:
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             Summary: org.apache.commons.vfs2.FileSystemOptions#options is not synchronized
                 Key: VFS-833
                 URL: https://issues.apache.org/jira/browse/VFS-833
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: 2.9.0
            Reporter: Kannan Ramamoorthy


*Problem:*

The map `org.apache.commons.vfs2.FileSystemOptions#options` is TreeMap. The datastructure is  not thread-safe and resulting in situations like [this|https://ivoanjo.me/blog/2018/07/21/writing-to-a-java-treemap-concurrently-can-lead-to-an-infinite-loop-during-reads/]  when used in multithreaded environments.

*Workaround:*

As a workaround, we have to synchronize the `FileSystemOptions` in all the places of the code. 

*Solution:*
 *  If there is no issue, the constructor `

protected FileSystemOptions(Map<FileSystemOptionKey, Object> options)` can be made public, so that users will have an option to pass a synchronized map when they have to. * Or, wrap the `TreeMap` instance with `java.util.Collections#synchronizedMap`, ensuring thread safety at the core.



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