| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.lucene.analysis.MockAnalyzer; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.document.NumericDocValuesField; |
| import org.apache.lucene.document.StringField; |
| import org.apache.lucene.index.IndexWriterConfig.OpenMode; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.MatchAllDocsQuery; |
| import org.apache.lucene.search.TermQuery; |
| import org.apache.lucene.store.Directory; |
| |
| import org.apache.lucene.util.LuceneTestCase; |
| |
| public class TestIndexWriterMergePolicy extends LuceneTestCase { |
| |
| |
| // Test the normal case |
| public void testNormalCase() throws IOException { |
| Directory dir = newDirectory(); |
| |
| IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(new LogDocMergePolicy())); |
| |
| for (int i = 0; i < 100; i++) { |
| addDoc(writer); |
| checkInvariants(writer); |
| } |
| |
| writer.close(); |
| dir.close(); |
| } |
| |
| // Test to see if there is over merge |
| public void testNoOverMerge() throws IOException { |
| Directory dir = newDirectory(); |
| |
| IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(new LogDocMergePolicy())); |
| |
| boolean noOverMerge = false; |
| for (int i = 0; i < 100; i++) { |
| addDoc(writer); |
| checkInvariants(writer); |
| if (writer.getNumBufferedDocuments() + writer.getSegmentCount() >= 18) { |
| noOverMerge = true; |
| } |
| } |
| assertTrue(noOverMerge); |
| |
| writer.close(); |
| dir.close(); |
| } |
| |
| // Test the case where flush is forced after every addDoc |
| public void testForceFlush() throws IOException { |
| Directory dir = newDirectory(); |
| |
| LogDocMergePolicy mp = new LogDocMergePolicy(); |
| mp.setMinMergeDocs(100); |
| mp.setMergeFactor(10); |
| IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(mp)); |
| |
| for (int i = 0; i < 100; i++) { |
| addDoc(writer); |
| writer.close(); |
| |
| mp = new LogDocMergePolicy(); |
| mp.setMergeFactor(10); |
| writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setOpenMode(OpenMode.APPEND) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(mp)); |
| mp.setMinMergeDocs(100); |
| checkInvariants(writer); |
| } |
| |
| writer.close(); |
| dir.close(); |
| } |
| |
| // Test the case where mergeFactor changes |
| public void testMergeFactorChange() throws IOException { |
| Directory dir = newDirectory(); |
| |
| IndexWriter writer = new IndexWriter( |
| dir, |
| newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(newLogMergePolicy()) |
| .setMergeScheduler(new SerialMergeScheduler()) |
| ); |
| |
| for (int i = 0; i < 250; i++) { |
| addDoc(writer); |
| checkInvariants(writer); |
| } |
| |
| ((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(5); |
| |
| // merge policy only fixes segments on levels where merges |
| // have been triggered, so check invariants after all adds |
| for (int i = 0; i < 10; i++) { |
| addDoc(writer); |
| } |
| checkInvariants(writer); |
| |
| writer.close(); |
| dir.close(); |
| } |
| |
| // Test the case where both mergeFactor and maxBufferedDocs change |
| @Nightly |
| public void testMaxBufferedDocsChange() throws IOException { |
| Directory dir = newDirectory(); |
| |
| IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMaxBufferedDocs(101) |
| .setMergePolicy(new LogDocMergePolicy()) |
| .setMergeScheduler(new SerialMergeScheduler())); |
| |
| // leftmost* segment has 1 doc |
| // rightmost* segment has 100 docs |
| for (int i = 1; i <= 100; i++) { |
| for (int j = 0; j < i; j++) { |
| addDoc(writer); |
| checkInvariants(writer); |
| } |
| writer.close(); |
| |
| writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setOpenMode(OpenMode.APPEND) |
| .setMaxBufferedDocs(101) |
| .setMergePolicy(new LogDocMergePolicy()) |
| .setMergeScheduler(new SerialMergeScheduler())); |
| } |
| |
| writer.close(); |
| LogDocMergePolicy ldmp = new LogDocMergePolicy(); |
| ldmp.setMergeFactor(10); |
| writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setOpenMode(OpenMode.APPEND) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(ldmp) |
| .setMergeScheduler(new SerialMergeScheduler())); |
| |
| // merge policy only fixes segments on levels where merges |
| // have been triggered, so check invariants after all adds |
| for (int i = 0; i < 100; i++) { |
| addDoc(writer); |
| } |
| checkInvariants(writer); |
| |
| for (int i = 100; i < 1000; i++) { |
| addDoc(writer); |
| } |
| writer.commit(); |
| writer.waitForMerges(); |
| writer.commit(); |
| checkInvariants(writer); |
| |
| writer.close(); |
| dir.close(); |
| } |
| |
| // Test the case where a merge results in no doc at all |
| public void testMergeDocCount0() throws IOException { |
| Directory dir = newDirectory(); |
| |
| LogDocMergePolicy ldmp = new LogDocMergePolicy(); |
| ldmp.setMergeFactor(100); |
| IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(ldmp)); |
| |
| for (int i = 0; i < 250; i++) { |
| addDoc(writer); |
| checkInvariants(writer); |
| } |
| writer.close(); |
| |
| // delete some docs without merging |
| writer = new IndexWriter( |
| dir, |
| newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMergePolicy(NoMergePolicy.INSTANCE) |
| ); |
| writer.deleteDocuments(new Term("content", "aaa")); |
| writer.close(); |
| |
| ldmp = new LogDocMergePolicy(); |
| ldmp.setMergeFactor(5); |
| writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setOpenMode(OpenMode.APPEND) |
| .setMaxBufferedDocs(10) |
| .setMergePolicy(ldmp) |
| .setMergeScheduler(new ConcurrentMergeScheduler())); |
| |
| // merge factor is changed, so check invariants after all adds |
| for (int i = 0; i < 10; i++) { |
| addDoc(writer); |
| } |
| writer.commit(); |
| writer.waitForMerges(); |
| writer.commit(); |
| checkInvariants(writer); |
| assertEquals(10, writer.getDocStats().maxDoc); |
| |
| writer.close(); |
| dir.close(); |
| } |
| |
| private void addDoc(IndexWriter writer) throws IOException { |
| Document doc = new Document(); |
| doc.add(newTextField("content", "aaa", Field.Store.NO)); |
| writer.addDocument(doc); |
| } |
| |
| private void checkInvariants(IndexWriter writer) throws IOException { |
| writer.waitForMerges(); |
| int maxBufferedDocs = writer.getConfig().getMaxBufferedDocs(); |
| int mergeFactor = ((LogMergePolicy) writer.getConfig().getMergePolicy()).getMergeFactor(); |
| int maxMergeDocs = ((LogMergePolicy) writer.getConfig().getMergePolicy()).getMaxMergeDocs(); |
| |
| int ramSegmentCount = writer.getNumBufferedDocuments(); |
| assertTrue(ramSegmentCount < maxBufferedDocs); |
| |
| int lowerBound = -1; |
| int upperBound = maxBufferedDocs; |
| int numSegments = 0; |
| |
| int segmentCount = writer.getSegmentCount(); |
| for (int i = segmentCount - 1; i >= 0; i--) { |
| int docCount = writer.maxDoc(i); |
| assertTrue("docCount=" + docCount + " lowerBound=" + lowerBound + " upperBound=" + upperBound + " i=" + i + " segmentCount=" + segmentCount + " index=" + writer.segString() + " config=" + writer.getConfig(), docCount > lowerBound); |
| |
| if (docCount <= upperBound) { |
| numSegments++; |
| } else { |
| if (upperBound * mergeFactor <= maxMergeDocs) { |
| assertTrue("maxMergeDocs=" + maxMergeDocs + "; numSegments=" + numSegments + "; upperBound=" + upperBound + "; mergeFactor=" + mergeFactor + "; segs=" + writer.segString() + " config=" + writer.getConfig(), numSegments < mergeFactor); |
| } |
| |
| do { |
| lowerBound = upperBound; |
| upperBound *= mergeFactor; |
| } while (docCount > upperBound); |
| numSegments = 1; |
| } |
| } |
| if (upperBound * mergeFactor <= maxMergeDocs) { |
| assertTrue(numSegments < mergeFactor); |
| } |
| } |
| |
| private static final double EPSILON = 1E-14; |
| |
| public void testSetters() { |
| assertSetters(new LogByteSizeMergePolicy()); |
| assertSetters(new LogDocMergePolicy()); |
| } |
| |
| // Test basic semantics of merge on commit |
| public void testMergeOnCommit() throws IOException { |
| Directory dir = newDirectory(); |
| |
| IndexWriter firstWriter = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMergePolicy(NoMergePolicy.INSTANCE)); |
| for (int i = 0; i < 5; i++) { |
| TestIndexWriter.addDoc(firstWriter); |
| firstWriter.flush(); |
| } |
| DirectoryReader firstReader = DirectoryReader.open(firstWriter); |
| assertEquals(5, firstReader.leaves().size()); |
| firstReader.close(); |
| firstWriter.close(); // When this writer closes, it does not merge on commit. |
| |
| IndexWriterConfig iwc = newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMergePolicy(new MergeOnXMergePolicy(newMergePolicy(), MergeTrigger.COMMIT)).setMaxFullFlushMergeWaitMillis(Integer.MAX_VALUE); |
| |
| |
| IndexWriter writerWithMergePolicy = new IndexWriter(dir, iwc); |
| writerWithMergePolicy.commit(); // No changes. Commit doesn't trigger a merge. |
| |
| DirectoryReader unmergedReader = DirectoryReader.open(writerWithMergePolicy); |
| assertEquals(5, unmergedReader.leaves().size()); |
| unmergedReader.close(); |
| |
| TestIndexWriter.addDoc(writerWithMergePolicy); |
| writerWithMergePolicy.commit(); // Doc added, do merge on commit. |
| assertEquals(1, writerWithMergePolicy.getSegmentCount()); // |
| |
| DirectoryReader mergedReader = DirectoryReader.open(writerWithMergePolicy); |
| assertEquals(1, mergedReader.leaves().size()); |
| mergedReader.close(); |
| |
| try (IndexReader reader = writerWithMergePolicy.getReader()) { |
| IndexSearcher searcher = new IndexSearcher(reader); |
| assertEquals(6, reader.numDocs()); |
| assertEquals(6, searcher.count(new MatchAllDocsQuery())); |
| } |
| |
| writerWithMergePolicy.close(); |
| dir.close(); |
| } |
| |
| private void assertSetters(MergePolicy lmp) { |
| lmp.setMaxCFSSegmentSizeMB(2.0); |
| assertEquals(2.0, lmp.getMaxCFSSegmentSizeMB(), EPSILON); |
| |
| lmp.setMaxCFSSegmentSizeMB(Double.POSITIVE_INFINITY); |
| assertEquals(Long.MAX_VALUE/1024/1024., lmp.getMaxCFSSegmentSizeMB(), EPSILON*Long.MAX_VALUE); |
| |
| lmp.setMaxCFSSegmentSizeMB(Long.MAX_VALUE/1024/1024.); |
| assertEquals(Long.MAX_VALUE/1024/1024., lmp.getMaxCFSSegmentSizeMB(), EPSILON*Long.MAX_VALUE); |
| |
| expectThrows(IllegalArgumentException.class, () -> { |
| lmp.setMaxCFSSegmentSizeMB(-2.0); |
| }); |
| |
| // TODO: Add more checks for other non-double setters! |
| } |
| |
| |
| public void testCarryOverNewDeletesOnCommit() throws IOException, InterruptedException { |
| try (Directory directory = newDirectory()) { |
| boolean useSoftDeletes = random().nextBoolean(); |
| CountDownLatch waitForMerge = new CountDownLatch(1); |
| CountDownLatch waitForUpdate = new CountDownLatch(1); |
| try (IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig() |
| .setMergePolicy(new MergeOnXMergePolicy(NoMergePolicy.INSTANCE, MergeTrigger.COMMIT)).setMaxFullFlushMergeWaitMillis(30 * 1000) |
| .setSoftDeletesField("soft_delete") |
| .setMaxBufferedDocs(Integer.MAX_VALUE) |
| .setRAMBufferSizeMB(100) |
| .setMergeScheduler(new ConcurrentMergeScheduler())) { |
| @Override |
| protected void merge(MergePolicy.OneMerge merge) throws IOException { |
| waitForMerge.countDown(); |
| try { |
| waitForUpdate.await(); |
| } catch (InterruptedException e) { |
| throw new AssertionError(e); |
| } |
| super.merge(merge); |
| } |
| }) { |
| |
| Document d1 = new Document(); |
| d1.add(new StringField("id", "1", Field.Store.NO)); |
| Document d2 = new Document(); |
| d2.add(new StringField("id", "2", Field.Store.NO)); |
| Document d3 = new Document(); |
| d3.add(new StringField("id", "3", Field.Store.NO)); |
| writer.addDocument(d1); |
| writer.flush(); |
| writer.addDocument(d2); |
| boolean addThreeDocs = random().nextBoolean(); |
| int expectedNumDocs = 2; |
| if (addThreeDocs) { // sometimes add another doc to ensure we don't have a fully deleted segment |
| expectedNumDocs = 3; |
| writer.addDocument(d3); |
| } |
| Thread t = new Thread(() -> { |
| try { |
| waitForMerge.await(); |
| if (useSoftDeletes) { |
| writer.softUpdateDocument(new Term("id", "2"), d2, new NumericDocValuesField("soft_delete", 1)); |
| } else { |
| writer.updateDocument(new Term("id", "2"), d2); |
| } |
| writer.flush(); |
| } catch (Exception e) { |
| throw new AssertionError(e); |
| } finally { |
| waitForUpdate.countDown(); |
| } |
| |
| }); |
| t.start(); |
| writer.commit(); |
| t.join(); |
| try (DirectoryReader open = new SoftDeletesDirectoryReaderWrapper(DirectoryReader.open(directory), "soft_delete")) { |
| assertEquals(expectedNumDocs, open.numDocs()); |
| assertEquals("we should not have any deletes", expectedNumDocs, open.maxDoc()); |
| } |
| |
| try (DirectoryReader open = DirectoryReader.open(writer)) { |
| assertEquals(expectedNumDocs, open.numDocs()); |
| assertEquals("we should not have one delete", expectedNumDocs+1, open.maxDoc()); |
| } |
| } |
| } |
| } |
| |
| /** |
| * This test makes sure we release the merge readers on abort. MDW will fail if it |
| * can't close all files |
| */ |
| |
| public void testAbortMergeOnCommit() throws IOException, InterruptedException { |
| abortMergeOnX(false); |
| } |
| |
| public void testAbortMergeOnGetReader() throws IOException, InterruptedException { |
| abortMergeOnX(true); |
| } |
| |
| void abortMergeOnX(boolean useGetReader) throws IOException, InterruptedException { |
| try (Directory directory = newDirectory()) { |
| CountDownLatch waitForMerge = new CountDownLatch(1); |
| CountDownLatch waitForDeleteAll = new CountDownLatch(1); |
| try (IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig() |
| .setMergePolicy(new MergeOnXMergePolicy(newMergePolicy(), useGetReader ? MergeTrigger.GET_READER : MergeTrigger.COMMIT)) |
| .setMaxFullFlushMergeWaitMillis(30 * 1000) |
| .setMergeScheduler(new SerialMergeScheduler() { |
| @Override |
| public synchronized void merge(MergeSource mergeSource, MergeTrigger trigger) throws IOException { |
| waitForMerge.countDown(); |
| try { |
| waitForDeleteAll.await(); |
| } catch (InterruptedException e) { |
| throw new AssertionError(e); |
| } |
| super.merge(mergeSource, trigger); |
| } |
| }))) { |
| |
| Document d1 = new Document(); |
| d1.add(new StringField("id", "1", Field.Store.NO)); |
| Document d2 = new Document(); |
| d2.add(new StringField("id", "2", Field.Store.NO)); |
| Document d3 = new Document(); |
| d3.add(new StringField("id", "3", Field.Store.NO)); |
| writer.addDocument(d1); |
| writer.flush(); |
| writer.addDocument(d2); |
| Thread t = new Thread(() -> { |
| boolean success = false; |
| try { |
| if (useGetReader) { |
| writer.getReader().close(); |
| } else { |
| writer.commit(); |
| } |
| success = true; |
| } catch (IOException e) { |
| throw new AssertionError(e); |
| } finally { |
| if (success == false) { |
| waitForMerge.countDown(); |
| } |
| } |
| }); |
| t.start(); |
| waitForMerge.await(); |
| writer.deleteAll(); |
| waitForDeleteAll.countDown(); |
| t.join(); |
| } |
| } |
| } |
| |
| public void testForceMergeWhileGetReader() throws IOException, InterruptedException { |
| try (Directory directory = newDirectory()) { |
| CountDownLatch waitForMerge = new CountDownLatch(1); |
| CountDownLatch waitForForceMergeCalled = new CountDownLatch(1); |
| try (IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig() |
| .setMergePolicy(new MergeOnXMergePolicy(newMergePolicy(), MergeTrigger.GET_READER)) |
| .setMaxFullFlushMergeWaitMillis(30 * 1000) |
| .setMergeScheduler(new SerialMergeScheduler() { |
| @Override |
| public void merge(MergeSource mergeSource, MergeTrigger trigger) throws IOException { |
| waitForMerge.countDown(); |
| try { |
| waitForForceMergeCalled.await(); |
| } catch (InterruptedException e) { |
| throw new AssertionError(e); |
| } |
| super.merge(mergeSource, trigger); |
| } |
| }))) { |
| Document d1 = new Document(); |
| d1.add(new StringField("id", "1", Field.Store.NO)); |
| writer.addDocument(d1); |
| writer.flush(); |
| Document d2 = new Document(); |
| d2.add(new StringField("id", "2", Field.Store.NO)); |
| writer.addDocument(d2); |
| Thread t = new Thread(() -> { |
| try (DirectoryReader reader = writer.getReader()){ |
| assertEquals(2, reader.maxDoc()); |
| } catch (IOException e) { |
| throw new AssertionError(e); |
| } |
| }); |
| t.start(); |
| waitForMerge.await(); |
| Document d3 = new Document(); |
| d3.add(new StringField("id", "3", Field.Store.NO)); |
| writer.addDocument(d3); |
| waitForForceMergeCalled.countDown(); |
| writer.forceMerge(1); |
| t.join(); |
| } |
| } |
| } |
| |
| public void testFailAfterMergeCommitted() throws IOException { |
| try (Directory directory = newDirectory()) { |
| AtomicBoolean mergeAndFail = new AtomicBoolean(false); |
| try (IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig() |
| .setMergePolicy(new MergeOnXMergePolicy(NoMergePolicy.INSTANCE, MergeTrigger.GET_READER)) |
| .setMaxFullFlushMergeWaitMillis(30 * 1000) |
| .setMergeScheduler(new SerialMergeScheduler())) { |
| @Override |
| protected void doAfterFlush() throws IOException { |
| if (mergeAndFail.get() && hasPendingMerges()) { |
| executeMerge(MergeTrigger.GET_READER); |
| throw new RuntimeException("boom"); |
| } |
| } |
| }) { |
| Document d1 = new Document(); |
| d1.add(new StringField("id", "1", Field.Store.NO)); |
| writer.addDocument(d1); |
| writer.flush(); |
| Document d2 = new Document(); |
| d2.add(new StringField("id", "2", Field.Store.NO)); |
| writer.addDocument(d2); |
| writer.flush(); |
| mergeAndFail.set(true); |
| try (DirectoryReader reader = writer.getReader()){ |
| assertNotNull(reader); // make compiler happy and use the reader |
| fail(); |
| } catch (RuntimeException e) { |
| assertEquals("boom", e.getMessage()); |
| } finally { |
| mergeAndFail.set(false); |
| } |
| } |
| } |
| } |
| |
| public void testStressUpdateSameDocumentWithMergeOnGetReader() throws IOException, InterruptedException { |
| stressUpdateSameDocumentWithMergeOnX(true); |
| } |
| |
| public void testStressUpdateSameDocumentWithMergeOnCommit() throws IOException, InterruptedException { |
| stressUpdateSameDocumentWithMergeOnX(false); |
| } |
| |
| void stressUpdateSameDocumentWithMergeOnX(boolean useGetReader) throws IOException, InterruptedException { |
| try (Directory directory = newDirectory()) { |
| try (RandomIndexWriter writer = new RandomIndexWriter(random(), directory, newIndexWriterConfig() |
| .setMergePolicy(new MergeOnXMergePolicy(newMergePolicy(), useGetReader ? MergeTrigger.GET_READER : MergeTrigger.COMMIT)) |
| .setMaxFullFlushMergeWaitMillis(10 + random().nextInt(2000)) |
| .setSoftDeletesField("soft_delete") |
| .setMergeScheduler(new ConcurrentMergeScheduler()))) { |
| Document d1 = new Document(); |
| d1.add(new StringField("id", "1", Field.Store.NO)); |
| writer.updateDocument(new Term("id", "1"), d1); |
| writer.commit(); |
| |
| AtomicInteger iters = new AtomicInteger(100 + random().nextInt(TEST_NIGHTLY ? 5000 : 1000)); |
| AtomicInteger numFullFlushes = new AtomicInteger(10 + random().nextInt(TEST_NIGHTLY ? 500 : 100)); |
| AtomicBoolean done = new AtomicBoolean(false); |
| Thread[] threads = new Thread[1 + random().nextInt(4)]; |
| for (int i = 0; i < threads.length; i++) { |
| Thread t = new Thread(() -> { |
| try { |
| while (iters.decrementAndGet() > 0 || numFullFlushes.get() > 0) { |
| writer.updateDocument(new Term("id", "1"), d1); |
| if (random().nextBoolean()) { |
| writer.addDocument(new Document()); |
| } |
| } |
| } catch (Exception e) { |
| throw new AssertionError(e); |
| } finally { |
| done.set(true); |
| } |
| |
| }); |
| t.start(); |
| threads[i] = t; |
| } |
| try { |
| while (done.get() == false) { |
| if (useGetReader) { |
| try (DirectoryReader reader = writer.getReader()) { |
| assertEquals(1, new IndexSearcher(reader).search(new TermQuery(new Term("id", "1")), 10).totalHits.value); |
| } |
| } else { |
| if (random().nextBoolean()) { |
| writer.commit(); |
| } |
| try (DirectoryReader open = new SoftDeletesDirectoryReaderWrapper(DirectoryReader.open(directory), "___soft_deletes")) { |
| assertEquals(1, new IndexSearcher(open).search(new TermQuery(new Term("id", "1")), 10).totalHits.value); |
| } |
| } |
| numFullFlushes.decrementAndGet(); |
| } |
| } finally { |
| numFullFlushes.set(0); |
| for (Thread t : threads) { |
| t.join(); |
| } |
| } |
| } |
| } |
| } |
| |
| // Test basic semantics of merge on getReader |
| public void testMergeOnGetReader() throws IOException { |
| Directory dir = newDirectory(); |
| |
| IndexWriter firstWriter = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMergePolicy(NoMergePolicy.INSTANCE)); |
| for (int i = 0; i < 5; i++) { |
| TestIndexWriter.addDoc(firstWriter); |
| firstWriter.flush(); |
| } |
| DirectoryReader firstReader = DirectoryReader.open(firstWriter); |
| assertEquals(5, firstReader.leaves().size()); |
| firstReader.close(); |
| firstWriter.close(); // When this writer closes, it does not merge on commit. |
| |
| IndexWriterConfig iwc = newIndexWriterConfig(new MockAnalyzer(random())) |
| .setMergePolicy(new MergeOnXMergePolicy(newMergePolicy(), MergeTrigger.GET_READER)).setMaxFullFlushMergeWaitMillis(Integer.MAX_VALUE); |
| |
| IndexWriter writerWithMergePolicy = new IndexWriter(dir, iwc); |
| |
| try (DirectoryReader unmergedReader = DirectoryReader.open(dir)) { // No changes. GetReader doesn't trigger a merge. |
| assertEquals(5, unmergedReader.leaves().size()); |
| } |
| |
| TestIndexWriter.addDoc(writerWithMergePolicy); |
| try (DirectoryReader mergedReader = writerWithMergePolicy.getReader()) { |
| // Doc added, do merge on getReader. |
| assertEquals(1, mergedReader.leaves().size()); |
| } |
| |
| writerWithMergePolicy.close(); |
| dir.close(); |
| } |
| |
| private static class MergeOnXMergePolicy extends FilterMergePolicy { |
| private final MergeTrigger trigger; |
| |
| private MergeOnXMergePolicy(MergePolicy in, MergeTrigger trigger) { |
| super(in); |
| this.trigger = trigger; |
| } |
| |
| @Override |
| public MergeSpecification findFullFlushMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergeContext mergeContext) { |
| // Optimize down to a single segment on commit |
| if (mergeTrigger == trigger && segmentInfos.size() > 1) { |
| List<SegmentCommitInfo> nonMergingSegments = new ArrayList<>(); |
| for (SegmentCommitInfo sci : segmentInfos) { |
| if (mergeContext.getMergingSegments().contains(sci) == false) { |
| nonMergingSegments.add(sci); |
| } |
| } |
| if (nonMergingSegments.size() > 1) { |
| MergeSpecification mergeSpecification = new MergeSpecification(); |
| mergeSpecification.add(new OneMerge(nonMergingSegments)); |
| return mergeSpecification; |
| } |
| } |
| return null; |
| } |
| } |
| } |
