Andrei Pozolotin created FELIX-3496:
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Summary: URLHandlers deadlock in jnlp context
Key: FELIX-3496
URL: https://issues.apache.org/jira/browse/FELIX-3496
Project: Felix
Issue Type: Bug
Components: Framework
Affects Versions: framework-4.0.2
Environment: oracle jre 1.6.0_31 x64 @ windows
Reporter: Andrei Pozolotin
1) we are seeing URLHandlers deadlock in jnlp context
2) this happens:
* in jnlp mode only (can not reproduce in non-jnlp)
* with frequency 1:10
* with multiple threads, both internal-felix-related and
external-embedder-host-related
doing heavy downloading of url resources;
3) seeming problem area is here:
http://svn.apache.org/viewvc/felix/trunk/framework/src/main/java/org/apache/felix/framework/URLHandlers.java?view=markup
public static Object getFrameworkFromContext()
{
// This is a hack. The idea is to return the only registered framework
synchronized (m_classloaderToFrameworkLists)
{
if (m_classloaderToFrameworkLists.isEmpty())
{
synchronized (m_frameworks)
{
if ((m_counter == 1) && (m_frameworks.size() == 1))
{
return m_frameworks.get(0);
}
}
}
}
4) stack traces attached
5) the workaround is to disable URLHandlers service via
config.put("felix.service.urlhandlers", "false");
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