package org.apache.lucene.index;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.lucene.store.MockDirectoryWrapper;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.util.LuceneTestCase;
import java.io.IOException;
import java.util.Random;
public class TestConcurrentMergeScheduler extends LuceneTestCase {
private static class FailOnlyOnFlush extends MockDirectoryWrapper.Failure {
boolean doFail;
boolean hitExc;
@Override
public void setDoFail() {
this.doFail = true;
hitExc = false;
}
@Override
public void clearDoFail() {
this.doFail = false;
}
@Override
public void eval(MockDirectoryWrapper dir) throws IOException {
if (doFail && Thread.currentThread().getName().equals("main")) {
StackTraceElement[] trace = new Exception().getStackTrace();
for (int i = 0; i < trace.length; i++) {
if ("doFlush".equals(trace[i].getMethodName())) {
hitExc = true;
throw new IOException("now failing during flush");
}
}
}
}
}
// Make sure running BG merges still work fine even when
// we are hitting exceptions during flushing.
public void testFlushExceptions() throws IOException {
Random random = newRandom();
MockDirectoryWrapper directory = newDirectory(random);
FailOnlyOnFlush failure = new FailOnlyOnFlush();
directory.failOn(failure);
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()).setMaxBufferedDocs(2));
Document doc = new Document();
Field idField = new Field("id", "", Field.Store.YES, Field.Index.NOT_ANALYZED);
doc.add(idField);
int extraCount = 0;
for(int i=0;i<10;i++) {
for(int j=0;j<20;j++) {
idField.setValue(Integer.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, false, true);
if (failure.hitExc) {
fail("failed to hit IOException");
}
extraCount++;
} catch (IOException ioe) {
failure.clearDoFail();
break;
}
}
}
writer.close();
IndexReader reader = IndexReader.open(directory, true);
assertEquals(200+extraCount, reader.numDocs());
reader.close();
directory.close();
}
// Test that deletes committed after a merge started and
// before it finishes, are correctly merged back:
public void testDeleteMerging() throws IOException {
Random random = newRandom();
MockDirectoryWrapper directory = newDirectory(random);
LogDocMergePolicy mp = new LogDocMergePolicy();
// Force degenerate merging so we can get a mix of
// merging of segments with and without deletes at the
// start:
mp.setMinMergeDocs(1000);
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setMergePolicy(mp));
Document doc = new Document();
Field idField = new Field("id", "", Field.Store.YES, Field.Index.NOT_ANALYZED);
doc.add(idField);
for(int i=0;i<10;i++) {
for(int j=0;j<100;j++) {
idField.setValue(Integer.toString(i*100+j));
writer.addDocument(doc);
}
int delID = i;
while(delID < 100*(1+i)) {
writer.deleteDocuments(new Term("id", ""+delID));
delID += 10;
}
writer.commit();
}
writer.close();
IndexReader reader = IndexReader.open(directory, true);
// Verify that we did not lose any deletes...
assertEquals(450, reader.numDocs());
reader.close();
directory.close();
}
public void testNoExtraFiles() throws IOException {
Random random = newRandom();
MockDirectoryWrapper directory = newDirectory(random);
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setMaxBufferedDocs(2));
for(int iter=0;iter<7;iter++) {
for(int j=0;j<21;j++) {
Document doc = new Document();
doc.add(new Field("content", "a b c", Field.Store.NO, Field.Index.ANALYZED));
writer.addDocument(doc);
}
writer.close();
TestIndexWriter.assertNoUnreferencedFiles(directory, "testNoExtraFiles");
// Reopen
writer = new IndexWriter(directory, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setOpenMode(OpenMode.APPEND).setMaxBufferedDocs(2));
}
writer.close();
directory.close();
}
public void testNoWaitClose() throws IOException {
Random random = newRandom();
MockDirectoryWrapper directory = newDirectory(random);
Document doc = new Document();
Field idField = new Field("id", "", Field.Store.YES, Field.Index.NOT_ANALYZED);
doc.add(idField);
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()).setMaxBufferedDocs(2));
((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(100);
for(int iter=0;iter<10;iter++) {
for(int j=0;j<201;j++) {
idField.setValue(Integer.toString(iter*201+j));
writer.addDocument(doc);
}
int delID = iter*201;
for(int j=0;j<20;j++) {
writer.deleteDocuments(new Term("id", Integer.toString(delID)));
delID += 5;
}
// Force a bunch of merge threads to kick off so we
// stress out aborting them on close:
((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(3);
writer.addDocument(doc);
writer.commit();
writer.close(false);
IndexReader reader = IndexReader.open(directory, true);
assertEquals((1+iter)*182, reader.numDocs());
reader.close();
// Reopen
writer = new IndexWriter(directory, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()).setOpenMode(OpenMode.APPEND));
((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(100);
}
writer.close();
directory.close();
}
}