Re: [buckminster-dev] Hanging Resolution Process

[Thomas Hallgren <thomas@xxxxxxx>]

Hi Filip,
Thanks for the complete trace. It helped me see the problem. Apparently 
the SVN client adapter is serializing everything (a pity, but not much 
we can do about). The deadlock occurs when a resolver encounters a 
cquery and starts a new resolve process. Meanwhile, it keeps the reader 
that discovered the cquery open. The new resolver tries to acquire new 
readers (or version finders) and fails of course.

I've added a fix for this and checked it in to our CVS. Let me know how 
it works.

Regards,
Thomas Hallgren


Filip Hrbek wrote:
> Hi,
>  
> I tried to resolve a more complex query but the process hangs, every 
> time at the same status.
>  
> I ran the BM in the debug mode and waited until it hang. This is the 
> stack trace at the moment it hangs:
>  
> Eclipse Application [Eclipse Application] 
>  org.eclipse.core.launcher.Main at localhost:1749 (Suspended) 
>   System Thread [Finalizer] (Suspended) 
>   System Thread [Reference Handler] (Suspended) 
>   Thread [main] (Suspended) 
>   System Thread [Signal Dispatcher] (Suspended) 
>   Thread [Framework Event Dispatcher] (Suspended) 
>   Thread [Start Level Event Dispatcher] (Suspended) 
>   Thread [Worker-0] (Suspended) 
>   Thread [Worker-1] (Suspended) 
>   Thread [Worker-2] (Suspended) 
>    Object.wait(long) line: not available [native method] 
>    ReentrantLock(Object).wait() line: not available 
>    ReentrantLock.acquire() line: 47 
>    OperationManager.beginOperation(ISVNClientAdapter) line: 78 
>    SvnSession.<init>(String, String, String) line: 162 
>    SvnRemoteFileReader.<init>(IReaderType, ProviderMatch) line: 98 
>    SvnReaderType.getReader(ProviderMatch, IProgressMonitor) line: 34 
>    ProviderMatch.getReader(IProgressMonitor) line: 123 
>    EclipseComponentType(AbstractComponentType).getResolution(ProviderMatch, 
> IProgressMonitor) line: 45 
>    ResourceMap.resolve(NodeQuery, IProgressMonitor) line: 116 
>    ResourceMapResolver.innerResolve(NodeQuery, IProgressMonitor) line: 195 
>    ResolverNodeWithJob.resolve(IProgressMonitor) line: 190 
>    ResolverNodeWithJob.run(IProgressMonitor) line: 81 
>    ResolverNodeWithJob$NodeResolutionJob.run(IProgressMonitor) line: 50 
>    Worker.run() line: 58 
>   Thread [Timer-0] (Suspended) 
>    Object.wait(long) line: not available [native method] 
>    TaskQueue(Object).wait() line: not available 
>    TimerThread.mainLoop() line: not available 
>    TimerThread.run() line: not available 
>   Thread [Worker-3] (Suspended) 
>    Object.wait(long) line: not available [native method] 
>    ReentrantLock(Object).wait() line: not available 
>    ReentrantLock.acquire() line: 47 
>    OperationManager.beginOperation(ISVNClientAdapter) line: 78 
>    VersionFinder(SvnSession).<init>(String, String, String) line: 162 
>    VersionFinder.<init>(String) line: 34 
>    SvnReaderType.getVersionFinder(Provider, NodeQuery, IProgressMonitor) 
> line: 41 
>    Provider.findMatch(NodeQuery, MultiStatus, IProgressMonitor) line: 175 
>    SearchPath.getProvider(NodeQuery, List<Provider>, MultiStatus, 
> IProgressMonitor) line: 90 
>    ResourceMap.resolve(NodeQuery, IProgressMonitor) line: 109 
>    ResourceMapResolver.innerResolve(NodeQuery, IProgressMonitor) line: 195 
>    ResolverNodeWithJob.resolve(IProgressMonitor) line: 190 
>    ResolverNodeWithJob.run(IProgressMonitor) line: 81 
>    ResolverNodeWithJob$NodeResolutionJob.run(IProgressMonitor) line: 50 
>    Worker.run() line: 58 
>   Thread [Worker-4] (Suspended) 
>    Object.wait(long) line: not available [native method] 
>    ReentrantLock(Object).wait() line: not available 
>    ReentrantLock.acquire() line: 47 
>    OperationManager.beginOperation(ISVNClientAdapter) line: 78 
>    VersionFinder(SvnSession).<init>(String, String, String) line: 162 
>    VersionFinder.<init>(String) line: 34 
>    SvnReaderType.getVersionFinder(Provider, NodeQuery, IProgressMonitor) 
> line: 41 
>    Provider.findMatch(NodeQuery, MultiStatus, IProgressMonitor) line: 175 
>    SearchPath.getProvider(NodeQuery, List<Provider>, MultiStatus, 
> IProgressMonitor) line: 90 
>    ResourceMap.resolve(NodeQuery, IProgressMonitor) line: 109 
>    ResourceMapResolver.innerResolve(NodeQuery, IProgressMonitor) line: 195 
>    ResolverNodeWithJob.resolve(IProgressMonitor) line: 190 
>    ResolverNodeWithJob.run(IProgressMonitor) line: 81 
>    ResolverNodeWithJob$NodeResolutionJob.run(IProgressMonitor) line: 50 
>    Worker.run() line: 58 
>   Thread [Worker-5] (Suspended) 
>    Object.wait(long) line: not available [native method] 
>    ReentrantLock(Object).wait() line: not available 
>    ReentrantLock.acquire() line: 47 
>    OperationManager.beginOperation(ISVNClientAdapter) line: 78 
>    VersionFinder(SvnSession).<init>(String, String, String) line: 162 
>    VersionFinder.<init>(String) line: 34 
>    SvnReaderType.getVersionFinder(Provider, NodeQuery, IProgressMonitor) 
> line: 41 
>    Provider.findMatch(NodeQuery, MultiStatus, IProgressMonitor) line: 175 
>    SearchPath.getProvider(NodeQuery, List<Provider>, MultiStatus, 
> IProgressMonitor) line: 90 
>    ResourceMap.resolve(NodeQuery, IProgressMonitor) line: 109 
>    ResourceMapResolver.innerResolve(NodeQuery, IProgressMonitor) line: 195 
>    ResolverNodeWithJob.resolve(IProgressMonitor) line: 190 
>    ResolverNodeWithJob.run(IProgressMonitor) line: 81 
>    ResolverNodeWithJob$NodeResolutionJob.run(IProgressMonitor) line: 50 
>    Worker.run() line: 58 
>  C:\Program Files\Java\jre1.5.0_10\bin\javaw.exe (9.2.2007 0:45:26) 
> Any idea?
>  
> Regards
>   Filip Hrbek
>