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  1. JDK
  2. JDK-8194653

Deadlock involving FileSystems.getDefault and System.loadLibrary call

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    Backports

      Description

        See http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-January/050819.html

        Thread A has called FileSystems.getDefault() which is doing <clinit> of DefaultFileSystemHolder, which in turn leads to Runtime.loadLibrary0 which needs to lock the Runtime instance.

        Thread B is already doing a loadLibrary and holds the Runtime lock, the loadLibrary code then needs to do FileSystems.getDefault() which has to load and initialize DefaultFileSystemHolder, but that initialization is already in progress so internally the thread does a wait().

        So Thread B is waiting for Thread A to finish initialization, but holds the monitor lock that Thread A needs to finish the initialization. Deadlock.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8226997 Deadlock involving FileSystems.getDefault and System.loadLibrary call

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8229601 Deadlock involving FileSystems.getDefault and System.loadLibrary call

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8235886 Deadlock involving FileSystems.getDefault and System.loadLibrary call

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8239161 Deadlock involving FileSystems.getDefault and System.loadLibrary call

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8222858 Deadlock involving FileSystems.getDefault and System.loadLibrary call

            • P3 - Major loss of function.
            • Closed
            duplicates

            Bug - A problem which impairs or prevents the functions of the product. JDK-8217884 File system iniitialization deadlock

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8220367 Investigate Deadlock involving FileSystems.getDefault and System.loadLibrary call

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8231584 Deadlock with ClassLoader.findLibrary and System.loadLibrary call

            • P3 - Major loss of function.
            • Closed

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                robm Robert Mckenna
                mchung Mandy Chung
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                  Updated:
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