Attached is a simple wrapper that can be used to replace the default
proxy selector, to eliminate the random crashes.
How to use: simply replace the default proxy selector as soon as
possible in your application code:
ProxySelector defaultProxySelector = ProxySelector.getDefault();
if (defaultProxySelector!=null)
ProxySelector.setDefault(new
ProxySelectorWrapper(defaultProxySelector));
Details: making the select() method synchronized eliminates the
possibility to concurrently access the MT-unsafe 'gconf_client' which is
used in the native method
sun.net.spi.DefaultProxySelector.getSystemProxy() (which in turn is
called by DefaultProxySelector.select() when property
java.net.useSystemProxies is set to true).
See:
- http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7188755
- http://mail.openjdk.java.net/pipermail/jdk7u-dev/2012-August/003911.html
- openjdk/jdk/src/solaris/native/sun/net/spi/DefaultProxySelector.c
- openjdk/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java
** Attachment added: "ProxySelectorWrapper.java"
https://bugs.launchpad.net/ubuntu/+source/openjdk-6/+bug/885195/+attachment/3439569/+files/ProxySelectorWrapper.java
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https://bugs.launchpad.net/bugs/885195
Title:
Multithreaded proxy detection crashes the JVM
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