public virtual void TestProcessEvictableResource()
{
FileSystem fs = Org.Mockito.Mockito.Mock <FileSystem>();
CleanerMetrics metrics = Org.Mockito.Mockito.Mock <CleanerMetrics>();
SCMStore store = Org.Mockito.Mockito.Mock <SCMStore>();
CleanerTask task = CreateSpiedTask(fs, store, metrics, new ReentrantLock());
// mock an evictable resource
Org.Mockito.Mockito.When(store.IsResourceEvictable(Matchers.IsA <string>(), Matchers.IsA
<FileStatus>())).ThenReturn(true);
FileStatus status = Org.Mockito.Mockito.Mock <FileStatus>();
Org.Mockito.Mockito.When(status.GetPath()).ThenReturn(new Path(Root + "/a/b/c/abc"
));
Org.Mockito.Mockito.When(store.RemoveResource(Matchers.IsA <string>())).ThenReturn
(true);
// rename succeeds
Org.Mockito.Mockito.When(fs.Rename(Matchers.IsA <Path>(), Matchers.IsA <Path>())).ThenReturn
(true);
// delete returns true
Org.Mockito.Mockito.When(fs.Delete(Matchers.IsA <Path>(), Matchers.AnyBoolean())).
ThenReturn(true);
// process the resource
task.ProcessSingleResource(status);
// the directory should be renamed
Org.Mockito.Mockito.Verify(fs).Rename(Matchers.Eq(status.GetPath()), Matchers.IsA
<Path>());
// metrics should record a deleted file
Org.Mockito.Mockito.Verify(metrics).ReportAFileDelete();
Org.Mockito.Mockito.Verify(metrics, Org.Mockito.Mockito.Never()).ReportAFileProcess
();
}
public virtual void TestResourceIsInUseHasAnActiveApp()
{
FileSystem fs = Org.Mockito.Mockito.Mock <FileSystem>();
CleanerMetrics metrics = Org.Mockito.Mockito.Mock <CleanerMetrics>();
SCMStore store = Org.Mockito.Mockito.Mock <SCMStore>();
FileStatus resource = Org.Mockito.Mockito.Mock <FileStatus>();
Org.Mockito.Mockito.When(resource.GetPath()).ThenReturn(new Path(Root + "/a/b/c/abc"
));
// resource is stale
Org.Mockito.Mockito.When(store.IsResourceEvictable(Matchers.IsA <string>(), Matchers.IsA
<FileStatus>())).ThenReturn(true);
// but still has appIds
Org.Mockito.Mockito.When(store.RemoveResource(Matchers.IsA <string>())).ThenReturn
(false);
CleanerTask task = CreateSpiedTask(fs, store, metrics, new ReentrantLock());
// process the resource
task.ProcessSingleResource(resource);
// metrics should record a processed file (but not delete)
Org.Mockito.Mockito.Verify(metrics).ReportAFileProcess();
Org.Mockito.Mockito.Verify(metrics, Org.Mockito.Mockito.Never()).ReportAFileDelete
();
}
/// <summary>Processes a single shared cache resource directory.</summary>
internal virtual void ProcessSingleResource(FileStatus resource)
{
Path path = resource.GetPath();
// indicates the processing status of the resource
CleanerTask.ResourceStatus resourceStatus = CleanerTask.ResourceStatus.Init;
// first, if the path ends with the renamed suffix, it indicates the
// directory was moved (as stale) but somehow not deleted (probably due to
// SCM failure); delete the directory
if (path.ToString().EndsWith(RenamedSuffix))
{
Log.Info("Found a renamed directory that was left undeleted at " + path.ToString(
) + ". Deleting.");
try
{
if (fs.Delete(path, true))
{
resourceStatus = CleanerTask.ResourceStatus.Deleted;
}
}
catch (IOException e)
{
Log.Error("Error while processing a shared cache resource: " + path, e);
}
}
else
{
// this is the path to the cache resource directory
// the directory name is the resource key (i.e. a unique identifier)
string key = path.GetName();
try
{
store.CleanResourceReferences(key);
}
catch (YarnException e)
{
Log.Error("Exception thrown while removing dead appIds.", e);
}
if (store.IsResourceEvictable(key, resource))
{
try
{
/*
* TODO See YARN-2663: There is a race condition between
* store.removeResource(key) and
* removeResourceFromCacheFileSystem(path) operations because they do
* not happen atomically and resources can be uploaded with different
* file names by the node managers.
*/
// remove the resource from scm (checks for appIds as well)
if (store.RemoveResource(key))
{
// remove the resource from the file system
bool deleted = RemoveResourceFromCacheFileSystem(path);
if (deleted)
{
resourceStatus = CleanerTask.ResourceStatus.Deleted;
}
else
{
Log.Error("Failed to remove path from the file system." + " Skipping this resource: "
+ path);
resourceStatus = CleanerTask.ResourceStatus.Error;
}
}
else
{
// we did not delete the resource because it contained application
// ids
resourceStatus = CleanerTask.ResourceStatus.Processed;
}
}
catch (IOException e)
{
Log.Error("Failed to remove path from the file system. Skipping this resource: "
+ path, e);
resourceStatus = CleanerTask.ResourceStatus.Error;
}
}
else
{
resourceStatus = CleanerTask.ResourceStatus.Processed;
}
}
switch (resourceStatus)
{
case CleanerTask.ResourceStatus.Deleted:
{
// record the processing
metrics.ReportAFileDelete();
break;
}
case CleanerTask.ResourceStatus.Processed:
{
metrics.ReportAFileProcess();
break;
}
case CleanerTask.ResourceStatus.Error:
{
metrics.ReportAFileError();
break;
}
default:
{
Log.Error("Cleaner encountered an invalid status (" + resourceStatus + ") while processing resource: "
+ path.GetName());
break;
}
}
}