public void TestExceptionOnBackgroundThreadIsPropagatedToCallingThread()
{
using (MockDirectoryWrapper dir = NewMockDirectory())
{
dir.FailOn(new FailOnlyOnMerge());
Document doc = new Document();
Field idField = NewStringField("id", "", Field.Store.YES);
doc.Add(idField);
var mergeScheduler = new ConcurrentMergeScheduler();
using (IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)).SetMergeScheduler(mergeScheduler).SetMaxBufferedDocs(2).SetRAMBufferSizeMB(IndexWriterConfig.DISABLE_AUTO_FLUSH).SetMergePolicy(NewLogMergePolicy())))
{
LogMergePolicy logMP = (LogMergePolicy)writer.Config.MergePolicy;
logMP.MergeFactor = 10;
for (int i = 0; i < 20; i++)
{
writer.AddDocument(doc);
}
bool exceptionHit = false;
try
{
mergeScheduler.Sync();
}
catch (MergePolicy.MergeException)
{
exceptionHit = true;
}
assertTrue(exceptionHit);
}
}
}
public virtual void TestFlushExceptions()
{
#if NETCOREAPP2_0
fail("LUCENENET TODO: Causing fatal crashes intermittently on NETCOREAPP2.0");
#endif
MockDirectoryWrapper directory = NewMockDirectory();
FailOnlyOnFlush failure = new FailOnlyOnFlush(this);
directory.FailOn(failure);
IndexWriter writer = new IndexWriter(directory, (IndexWriterConfig)NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)).SetMaxBufferedDocs(2));
Document doc = new Document();
Field idField = NewStringField("id", "", Field.Store.YES);
doc.Add(idField);
int extraCount = 0;
for (int i = 0; i < 10; i++)
{
if (VERBOSE)
{
Console.WriteLine("TEST: iter=" + i);
}
for (int j = 0; j < 20; j++)
{
idField.SetStringValue(Convert.ToString(i * 20 + j));
writer.AddDocument(doc);
}
// must cycle here because sometimes the merge flushes
// the doc we just added and so there's nothing to
// flush, and we don't hit the exception
while (true)
{
writer.AddDocument(doc);
failure.SetDoFail();
try
{
writer.Flush(true, true);
if (failure.hitExc)
{
Assert.Fail("failed to hit IOException");
}
extraCount++;
}
catch (IOException ioe)
{
if (VERBOSE)
{
Console.WriteLine(ioe.StackTrace);
}
failure.ClearDoFail();
break;
}
}
Assert.AreEqual(20 * (i + 1) + extraCount, writer.NumDocs);
}
writer.Dispose();
IndexReader reader = DirectoryReader.Open(directory);
Assert.AreEqual(200 + extraCount, reader.NumDocs);
reader.Dispose();
directory.Dispose();
}
