/**
  * Tries to lock all local shards for the given index. If any of the shard locks can't be acquired
  * an {@link LockObtainFailedException} is thrown and all previously acquired locks are released.
  *
  * @param index the index to lock shards for
  * @param lockTimeoutMS how long to wait for acquiring the indices shard locks
  * @return the {@link ShardLock} instances for this index.
  * @throws IOException if an IOException occurs.
  */
 public List<ShardLock> lockAllForIndex(
     Index index, @IndexSettings Settings settings, long lockTimeoutMS) throws IOException {
   final Integer numShards = settings.getAsInt(IndexMetaData.SETTING_NUMBER_OF_SHARDS, null);
   if (numShards == null || numShards <= 0) {
     throw new IllegalArgumentException("settings must contain a non-null > 0 number of shards");
   }
   logger.trace("locking all shards for index {} - [{}]", index, numShards);
   List<ShardLock> allLocks = new ArrayList<>(numShards);
   boolean success = false;
   long startTimeNS = System.nanoTime();
   try {
     for (int i = 0; i < numShards; i++) {
       long timeoutLeftMS =
           Math.max(0, lockTimeoutMS - TimeValue.nsecToMSec((System.nanoTime() - startTimeNS)));
       allLocks.add(shardLock(new ShardId(index, i), timeoutLeftMS));
     }
     success = true;
   } finally {
     if (success == false) {
       logger.trace("unable to lock all shards for index {}", index);
       IOUtils.closeWhileHandlingException(allLocks);
     }
   }
   return allLocks;
 }
  public void testRandom() throws Exception {

    int num = atLeast(2);
    for (int iter = 0; iter < num; iter++) {
      if (VERBOSE) {
        System.out.println("TEST: iter=" + iter);
      }

      Directory dir = newDirectory();

      IndexWriter w =
          new IndexWriter(
              dir,
              newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()))
                  .setMergePolicy(NoMergePolicy.COMPOUND_FILES));
      _TestUtil.keepFullyDeletedSegments(w);

      Map<BytesRef, List<Integer>> docs = new HashMap<BytesRef, List<Integer>>();
      Set<Integer> deleted = new HashSet<Integer>();
      List<BytesRef> terms = new ArrayList<BytesRef>();

      int numDocs = _TestUtil.nextInt(random(), 1, 100 * RANDOM_MULTIPLIER);
      Document doc = new Document();
      Field f = newStringField("field", "", Field.Store.NO);
      doc.add(f);
      Field id = newStringField("id", "", Field.Store.NO);
      doc.add(id);

      boolean onlyUniqueTerms = random().nextBoolean();
      if (VERBOSE) {
        System.out.println("TEST: onlyUniqueTerms=" + onlyUniqueTerms + " numDocs=" + numDocs);
      }
      Set<BytesRef> uniqueTerms = new HashSet<BytesRef>();
      for (int i = 0; i < numDocs; i++) {

        if (!onlyUniqueTerms && random().nextBoolean() && terms.size() > 0) {
          // re-use existing term
          BytesRef term = terms.get(random().nextInt(terms.size()));
          docs.get(term).add(i);
          f.setStringValue(term.utf8ToString());
        } else {
          String s = _TestUtil.randomUnicodeString(random(), 10);
          BytesRef term = new BytesRef(s);
          if (!docs.containsKey(term)) {
            docs.put(term, new ArrayList<Integer>());
          }
          docs.get(term).add(i);
          terms.add(term);
          uniqueTerms.add(term);
          f.setStringValue(s);
        }
        id.setStringValue("" + i);
        w.addDocument(doc);
        if (random().nextInt(4) == 1) {
          w.commit();
        }
        if (i > 0 && random().nextInt(20) == 1) {
          int delID = random().nextInt(i);
          deleted.add(delID);
          w.deleteDocuments(new Term("id", "" + delID));
          if (VERBOSE) {
            System.out.println("TEST: delete " + delID);
          }
        }
      }

      if (VERBOSE) {
        List<BytesRef> termsList = new ArrayList<BytesRef>(uniqueTerms);
        Collections.sort(termsList, BytesRef.getUTF8SortedAsUTF16Comparator());
        System.out.println("TEST: terms in UTF16 order:");
        for (BytesRef b : termsList) {
          System.out.println("  " + UnicodeUtil.toHexString(b.utf8ToString()) + " " + b);
          for (int docID : docs.get(b)) {
            if (deleted.contains(docID)) {
              System.out.println("    " + docID + " (deleted)");
            } else {
              System.out.println("    " + docID);
            }
          }
        }
      }

      IndexReader reader = w.getReader();
      w.close();
      if (VERBOSE) {
        System.out.println("TEST: reader=" + reader);
      }

      Bits liveDocs = MultiFields.getLiveDocs(reader);
      for (int delDoc : deleted) {
        assertFalse(liveDocs.get(delDoc));
      }

      for (int i = 0; i < 100; i++) {
        BytesRef term = terms.get(random().nextInt(terms.size()));
        if (VERBOSE) {
          System.out.println(
              "TEST: seek term=" + UnicodeUtil.toHexString(term.utf8ToString()) + " " + term);
        }

        DocsEnum docsEnum = _TestUtil.docs(random(), reader, "field", term, liveDocs, null, 0);
        assertNotNull(docsEnum);

        for (int docID : docs.get(term)) {
          if (!deleted.contains(docID)) {
            assertEquals(docID, docsEnum.nextDoc());
          }
        }
        assertEquals(DocIdSetIterator.NO_MORE_DOCS, docsEnum.nextDoc());
      }

      reader.close();
      dir.close();
    }
  }
Example #3
0
  @Test
  public void testRecoveryDiff() throws IOException, InterruptedException {
    int numDocs = 2 + random().nextInt(100);
    List<Document> docs = new ArrayList<>();
    for (int i = 0; i < numDocs; i++) {
      Document doc = new Document();
      doc.add(
          new StringField("id", "" + i, random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
      doc.add(
          new TextField(
              "body",
              TestUtil.randomRealisticUnicodeString(random()),
              random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
      doc.add(
          new SortedDocValuesField(
              "dv", new BytesRef(TestUtil.randomRealisticUnicodeString(random()))));
      docs.add(doc);
    }
    long seed = random().nextLong();
    Store.MetadataSnapshot first;
    {
      Random random = new Random(seed);
      IndexWriterConfig iwc =
          new IndexWriterConfig(new MockAnalyzer(random)).setCodec(actualDefaultCodec());
      iwc.setMergePolicy(NoMergePolicy.INSTANCE);
      iwc.setUseCompoundFile(random.nextBoolean());
      iwc.setMaxThreadStates(1);
      final ShardId shardId = new ShardId(new Index("index"), 1);
      DirectoryService directoryService = new LuceneManagedDirectoryService(random);
      Store store =
          new Store(
              shardId,
              ImmutableSettings.EMPTY,
              directoryService,
              randomDistributor(random, directoryService),
              new DummyShardLock(shardId));
      IndexWriter writer = new IndexWriter(store.directory(), iwc);
      final boolean lotsOfSegments = rarely(random);
      for (Document d : docs) {
        writer.addDocument(d);
        if (lotsOfSegments && random.nextBoolean()) {
          writer.commit();
        } else if (rarely(random)) {
          writer.commit();
        }
      }
      writer.commit();
      writer.close();
      first = store.getMetadata();
      assertDeleteContent(store, directoryService);
      store.close();
    }
    long time = new Date().getTime();
    while (time == new Date().getTime()) {
      Thread.sleep(10); // bump the time
    }
    Store.MetadataSnapshot second;
    Store store;
    {
      Random random = new Random(seed);
      IndexWriterConfig iwc =
          new IndexWriterConfig(new MockAnalyzer(random)).setCodec(actualDefaultCodec());
      iwc.setMergePolicy(NoMergePolicy.INSTANCE);
      iwc.setUseCompoundFile(random.nextBoolean());
      iwc.setMaxThreadStates(1);
      final ShardId shardId = new ShardId(new Index("index"), 1);
      DirectoryService directoryService = new LuceneManagedDirectoryService(random);
      store =
          new Store(
              shardId,
              ImmutableSettings.EMPTY,
              directoryService,
              randomDistributor(random, directoryService),
              new DummyShardLock(shardId));
      IndexWriter writer = new IndexWriter(store.directory(), iwc);
      final boolean lotsOfSegments = rarely(random);
      for (Document d : docs) {
        writer.addDocument(d);
        if (lotsOfSegments && random.nextBoolean()) {
          writer.commit();
        } else if (rarely(random)) {
          writer.commit();
        }
      }
      writer.commit();
      writer.close();
      second = store.getMetadata();
    }
    Store.RecoveryDiff diff = first.recoveryDiff(second);
    assertThat(first.size(), equalTo(second.size()));
    for (StoreFileMetaData md : first) {
      assertThat(second.get(md.name()), notNullValue());
      // si files are different - containing timestamps etc
      assertThat(second.get(md.name()).isSame(md), equalTo(false));
    }
    assertThat(diff.different.size(), equalTo(first.size()));
    assertThat(
        diff.identical.size(),
        equalTo(0)); // in lucene 5 nothing is identical - we use random ids in file headers
    assertThat(diff.missing, empty());

    // check the self diff
    Store.RecoveryDiff selfDiff = first.recoveryDiff(first);
    assertThat(selfDiff.identical.size(), equalTo(first.size()));
    assertThat(selfDiff.different, empty());
    assertThat(selfDiff.missing, empty());

    // lets add some deletes
    Random random = new Random(seed);
    IndexWriterConfig iwc =
        new IndexWriterConfig(new MockAnalyzer(random)).setCodec(actualDefaultCodec());
    iwc.setMergePolicy(NoMergePolicy.INSTANCE);
    iwc.setUseCompoundFile(random.nextBoolean());
    iwc.setMaxThreadStates(1);
    iwc.setOpenMode(IndexWriterConfig.OpenMode.APPEND);
    IndexWriter writer = new IndexWriter(store.directory(), iwc);
    writer.deleteDocuments(new Term("id", Integer.toString(random().nextInt(numDocs))));
    writer.commit();
    writer.close();
    Store.MetadataSnapshot metadata = store.getMetadata();
    StoreFileMetaData delFile = null;
    for (StoreFileMetaData md : metadata) {
      if (md.name().endsWith(".liv")) {
        delFile = md;
        break;
      }
    }
    Store.RecoveryDiff afterDeleteDiff = metadata.recoveryDiff(second);
    if (delFile != null) {
      assertThat(
          afterDeleteDiff.identical.size(), equalTo(metadata.size() - 2)); // segments_N + del file
      assertThat(afterDeleteDiff.different.size(), equalTo(0));
      assertThat(afterDeleteDiff.missing.size(), equalTo(2));
    } else {
      // an entire segment must be missing (single doc segment got dropped)
      assertThat(afterDeleteDiff.identical.size(), greaterThan(0));
      assertThat(afterDeleteDiff.different.size(), equalTo(0));
      assertThat(afterDeleteDiff.missing.size(), equalTo(1)); // the commit file is different
    }

    // check the self diff
    selfDiff = metadata.recoveryDiff(metadata);
    assertThat(selfDiff.identical.size(), equalTo(metadata.size()));
    assertThat(selfDiff.different, empty());
    assertThat(selfDiff.missing, empty());

    // add a new commit
    iwc = new IndexWriterConfig(new MockAnalyzer(random)).setCodec(actualDefaultCodec());
    iwc.setMergePolicy(NoMergePolicy.INSTANCE);
    iwc.setUseCompoundFile(
        true); // force CFS - easier to test here since we know it will add 3 files
    iwc.setMaxThreadStates(1);
    iwc.setOpenMode(IndexWriterConfig.OpenMode.APPEND);
    writer = new IndexWriter(store.directory(), iwc);
    writer.addDocument(docs.get(0));
    writer.close();

    Store.MetadataSnapshot newCommitMetaData = store.getMetadata();
    Store.RecoveryDiff newCommitDiff = newCommitMetaData.recoveryDiff(metadata);
    if (delFile != null) {
      assertThat(
          newCommitDiff.identical.size(),
          equalTo(
              newCommitMetaData.size()
                  - 5)); // segments_N, del file, cfs, cfe, si for the new segment
      assertThat(newCommitDiff.different.size(), equalTo(1)); // the del file must be different
      assertThat(newCommitDiff.different.get(0).name(), endsWith(".liv"));
      assertThat(
          newCommitDiff.missing.size(), equalTo(4)); // segments_N,cfs, cfe, si for the new segment
    } else {
      assertThat(
          newCommitDiff.identical.size(),
          equalTo(newCommitMetaData.size() - 4)); // segments_N, cfs, cfe, si for the new segment
      assertThat(newCommitDiff.different.size(), equalTo(0));
      assertThat(
          newCommitDiff.missing.size(),
          equalTo(
              4)); // an entire segment must be missing (single doc segment got dropped)  plus the
                   // commit is different
    }

    store.deleteContent();
    IOUtils.close(store);
  }