Examples with IndexCommit org.apache.lucene.index.IndexCommit used on opensource projects

Example 41 with IndexCommit

use of org.apache.lucene.index.IndexCommit in project lucene-solr by apache.

the class IndexFetcher method fetchLatestIndex.

/**
   * This command downloads all the necessary files from master to install a index commit point. Only changed files are
   * downloaded. It also downloads the conf files (if they are modified).
   *
   * @param forceReplication force a replication in all cases
   * @param forceCoreReload force a core reload in all cases
   * @return true on success, false if slave is already in sync
   * @throws IOException if an exception occurs
   */
IndexFetchResult fetchLatestIndex(boolean forceReplication, boolean forceCoreReload) throws IOException, InterruptedException {
    boolean cleanupDone = false;
    boolean successfulInstall = false;
    markReplicationStart();
    Directory tmpIndexDir = null;
    String tmpIndex;
    Directory indexDir = null;
    String indexDirPath;
    boolean deleteTmpIdxDir = true;
    File tmpTlogDir = null;
    if (!solrCore.getSolrCoreState().getLastReplicateIndexSuccess()) {
        // if the last replication was not a success, we force a full replication
        // when we are a bit more confident we may want to try a partial replication
        // if the error is connection related or something, but we have to be careful
        forceReplication = true;
        LOG.info("Last replication failed, so I'll force replication");
    }
    try {
        if (fetchFromLeader) {
            assert !solrCore.isClosed() : "Replication should be stopped before closing the core";
            Replica replica = getLeaderReplica();
            CloudDescriptor cd = solrCore.getCoreDescriptor().getCloudDescriptor();
            if (cd.getCoreNodeName().equals(replica.getName())) {
                return IndexFetchResult.EXPECTING_NON_LEADER;
            }
            if (replica.getState() != Replica.State.ACTIVE) {
                LOG.info("Replica {} is leader but it's state is {}, skipping replication", replica.getName(), replica.getState());
                return IndexFetchResult.LEADER_IS_NOT_ACTIVE;
            }
            if (!solrCore.getCoreContainer().getZkController().getClusterState().liveNodesContain(replica.getNodeName())) {
                LOG.info("Replica {} is leader but it's not hosted on a live node, skipping replication", replica.getName());
                return IndexFetchResult.LEADER_IS_NOT_ACTIVE;
            }
            if (!replica.getCoreUrl().equals(masterUrl)) {
                masterUrl = replica.getCoreUrl();
                LOG.info("Updated masterUrl to {}", masterUrl);
            // TODO: Do we need to set forceReplication = true?
            } else {
                LOG.debug("masterUrl didn't change");
            }
        }
        //get the current 'replicateable' index version in the master
        NamedList response;
        try {
            response = getLatestVersion();
        } catch (Exception e) {
            final String errorMsg = e.toString();
            if (!Strings.isNullOrEmpty(errorMsg) && errorMsg.contains(INTERRUPT_RESPONSE_MESSAGE)) {
                LOG.warn("Master at: " + masterUrl + " is not available. Index fetch failed by interrupt. Exception: " + errorMsg);
                return new IndexFetchResult(IndexFetchResult.FAILED_BY_INTERRUPT_MESSAGE, false, e);
            } else {
                LOG.warn("Master at: " + masterUrl + " is not available. Index fetch failed by exception: " + errorMsg);
                return new IndexFetchResult(IndexFetchResult.FAILED_BY_EXCEPTION_MESSAGE, false, e);
            }
        }
        long latestVersion = (Long) response.get(CMD_INDEX_VERSION);
        long latestGeneration = (Long) response.get(GENERATION);
        LOG.info("Master's generation: " + latestGeneration);
        LOG.info("Master's version: " + latestVersion);
        // TODO: make sure that getLatestCommit only returns commit points for the main index (i.e. no side-car indexes)
        IndexCommit commit = solrCore.getDeletionPolicy().getLatestCommit();
        if (commit == null) {
            // Presumably the IndexWriter hasn't been opened yet, and hence the deletion policy hasn't been updated with commit points
            RefCounted<SolrIndexSearcher> searcherRefCounted = null;
            try {
                searcherRefCounted = solrCore.getNewestSearcher(false);
                if (searcherRefCounted == null) {
                    LOG.warn("No open searcher found - fetch aborted");
                    return IndexFetchResult.NO_INDEX_COMMIT_EXIST;
                }
                commit = searcherRefCounted.get().getIndexReader().getIndexCommit();
            } finally {
                if (searcherRefCounted != null)
                    searcherRefCounted.decref();
            }
        }
        LOG.info("Slave's generation: " + commit.getGeneration());
        LOG.info("Slave's version: " + IndexDeletionPolicyWrapper.getCommitTimestamp(commit));
        if (latestVersion == 0L) {
            if (forceReplication && commit.getGeneration() != 0) {
                // since we won't get the files for an empty index,
                // we just clear ours and commit
                LOG.info("New index in Master. Deleting mine...");
                RefCounted<IndexWriter> iw = solrCore.getUpdateHandler().getSolrCoreState().getIndexWriter(solrCore);
                try {
                    iw.get().deleteAll();
                } finally {
                    iw.decref();
                }
                SolrQueryRequest req = new LocalSolrQueryRequest(solrCore, new ModifiableSolrParams());
                solrCore.getUpdateHandler().commit(new CommitUpdateCommand(req, false));
            }
            //there is nothing to be replicated
            successfulInstall = true;
            LOG.debug("Nothing to replicate, master's version is 0");
            return IndexFetchResult.MASTER_VERSION_ZERO;
        }
        // TODO: Should we be comparing timestamps (across machines) here?
        if (!forceReplication && IndexDeletionPolicyWrapper.getCommitTimestamp(commit) == latestVersion) {
            //master and slave are already in sync just return
            LOG.info("Slave in sync with master.");
            successfulInstall = true;
            return IndexFetchResult.ALREADY_IN_SYNC;
        }
        LOG.info("Starting replication process");
        // get the list of files first
        fetchFileList(latestGeneration);
        // this can happen if the commit point is deleted before we fetch the file list.
        if (filesToDownload.isEmpty()) {
            return IndexFetchResult.PEER_INDEX_COMMIT_DELETED;
        }
        LOG.info("Number of files in latest index in master: " + filesToDownload.size());
        if (tlogFilesToDownload != null) {
            LOG.info("Number of tlog files in master: " + tlogFilesToDownload.size());
        }
        // Create the sync service
        fsyncService = ExecutorUtil.newMDCAwareSingleThreadExecutor(new DefaultSolrThreadFactory("fsyncService"));
        // use a synchronized list because the list is read by other threads (to show details)
        filesDownloaded = Collections.synchronizedList(new ArrayList<Map<String, Object>>());
        // if the generation of master is older than that of the slave , it means they are not compatible to be copied
        // then a new index directory to be created and all the files need to be copied
        boolean isFullCopyNeeded = IndexDeletionPolicyWrapper.getCommitTimestamp(commit) >= latestVersion || commit.getGeneration() >= latestGeneration || forceReplication;
        String timestamp = new SimpleDateFormat(SnapShooter.DATE_FMT, Locale.ROOT).format(new Date());
        String tmpIdxDirName = "index." + timestamp;
        tmpIndex = solrCore.getDataDir() + tmpIdxDirName;
        tmpIndexDir = solrCore.getDirectoryFactory().get(tmpIndex, DirContext.DEFAULT, solrCore.getSolrConfig().indexConfig.lockType);
        // tmp dir for tlog files
        if (tlogFilesToDownload != null) {
            tmpTlogDir = new File(solrCore.getUpdateHandler().getUpdateLog().getLogDir(), "tlog." + timestamp);
        }
        // cindex dir...
        indexDirPath = solrCore.getIndexDir();
        indexDir = solrCore.getDirectoryFactory().get(indexDirPath, DirContext.DEFAULT, solrCore.getSolrConfig().indexConfig.lockType);
        try {
            //in the metadata. If there is a mismatch for the same index file then we download the entire index again.
            if (!isFullCopyNeeded && isIndexStale(indexDir)) {
                isFullCopyNeeded = true;
            }
            if (!isFullCopyNeeded && !fetchFromLeader) {
                // and wait until we are able to clean up all unused lucene files
                if (solrCore.getCoreContainer().isZooKeeperAware()) {
                    solrCore.closeSearcher();
                }
                // rollback and reopen index writer and wait until all unused files
                // are successfully deleted
                solrCore.getUpdateHandler().newIndexWriter(true);
                RefCounted<IndexWriter> writer = solrCore.getUpdateHandler().getSolrCoreState().getIndexWriter(null);
                try {
                    IndexWriter indexWriter = writer.get();
                    int c = 0;
                    indexWriter.deleteUnusedFiles();
                    while (hasUnusedFiles(indexDir, commit)) {
                        indexWriter.deleteUnusedFiles();
                        LOG.info("Sleeping for 1000ms to wait for unused lucene index files to be delete-able");
                        Thread.sleep(1000);
                        c++;
                        if (c >= 30) {
                            LOG.warn("IndexFetcher unable to cleanup unused lucene index files so we must do a full copy instead");
                            isFullCopyNeeded = true;
                            break;
                        }
                    }
                    if (c > 0) {
                        LOG.info("IndexFetcher slept for " + (c * 1000) + "ms for unused lucene index files to be delete-able");
                    }
                } finally {
                    writer.decref();
                }
            }
            boolean reloadCore = false;
            try {
                // we have to be careful and do this after we know isFullCopyNeeded won't be flipped
                if (!isFullCopyNeeded) {
                    solrCore.getUpdateHandler().getSolrCoreState().closeIndexWriter(solrCore, true);
                }
                LOG.info("Starting download (fullCopy={}) to {}", isFullCopyNeeded, tmpIndexDir);
                successfulInstall = false;
                long bytesDownloaded = downloadIndexFiles(isFullCopyNeeded, indexDir, tmpIndexDir, latestGeneration);
                if (tlogFilesToDownload != null) {
                    bytesDownloaded += downloadTlogFiles(tmpTlogDir, latestGeneration);
                    // reload update log
                    reloadCore = true;
                }
                final long timeTakenSeconds = getReplicationTimeElapsed();
                final Long bytesDownloadedPerSecond = (timeTakenSeconds != 0 ? new Long(bytesDownloaded / timeTakenSeconds) : null);
                LOG.info("Total time taken for download (fullCopy={},bytesDownloaded={}) : {} secs ({} bytes/sec) to {}", isFullCopyNeeded, bytesDownloaded, timeTakenSeconds, bytesDownloadedPerSecond, tmpIndexDir);
                Collection<Map<String, Object>> modifiedConfFiles = getModifiedConfFiles(confFilesToDownload);
                if (!modifiedConfFiles.isEmpty()) {
                    reloadCore = true;
                    downloadConfFiles(confFilesToDownload, latestGeneration);
                    if (isFullCopyNeeded) {
                        successfulInstall = solrCore.modifyIndexProps(tmpIdxDirName);
                        if (successfulInstall)
                            deleteTmpIdxDir = false;
                    } else {
                        successfulInstall = moveIndexFiles(tmpIndexDir, indexDir);
                    }
                    if (tlogFilesToDownload != null) {
                        // move tlog files and refresh ulog only if we successfully installed a new index
                        successfulInstall &= moveTlogFiles(tmpTlogDir);
                    }
                    if (successfulInstall) {
                        if (isFullCopyNeeded) {
                            // may be closed
                            if (indexDir != null) {
                                solrCore.getDirectoryFactory().doneWithDirectory(indexDir);
                                // Cleanup all index files not associated with any *named* snapshot.
                                solrCore.deleteNonSnapshotIndexFiles(indexDirPath);
                            }
                        }
                        LOG.info("Configuration files are modified, core will be reloaded");
                        logReplicationTimeAndConfFiles(modifiedConfFiles, // write to a file time of replication and
                        successfulInstall);
                    // conf files.
                    }
                } else {
                    terminateAndWaitFsyncService();
                    if (isFullCopyNeeded) {
                        successfulInstall = solrCore.modifyIndexProps(tmpIdxDirName);
                        if (successfulInstall)
                            deleteTmpIdxDir = false;
                    } else {
                        successfulInstall = moveIndexFiles(tmpIndexDir, indexDir);
                    }
                    if (tlogFilesToDownload != null) {
                        // move tlog files and refresh ulog only if we successfully installed a new index
                        successfulInstall &= moveTlogFiles(tmpTlogDir);
                    }
                    if (successfulInstall) {
                        logReplicationTimeAndConfFiles(modifiedConfFiles, successfulInstall);
                    }
                }
            } finally {
                if (!isFullCopyNeeded) {
                    solrCore.getUpdateHandler().getSolrCoreState().openIndexWriter(solrCore);
                }
            }
            // we must reload the core after we open the IW back up
            if (successfulInstall && (reloadCore || forceCoreReload)) {
                LOG.info("Reloading SolrCore {}", solrCore.getName());
                reloadCore();
            }
            if (successfulInstall) {
                if (isFullCopyNeeded) {
                    // may be closed
                    if (indexDir != null) {
                        LOG.info("removing old index directory " + indexDir);
                        solrCore.getDirectoryFactory().doneWithDirectory(indexDir);
                        solrCore.getDirectoryFactory().remove(indexDir);
                    }
                }
                if (isFullCopyNeeded) {
                    solrCore.getUpdateHandler().newIndexWriter(isFullCopyNeeded);
                }
                openNewSearcherAndUpdateCommitPoint();
            }
            if (!isFullCopyNeeded && !forceReplication && !successfulInstall) {
                cleanup(solrCore, tmpIndexDir, indexDir, deleteTmpIdxDir, tmpTlogDir, successfulInstall);
                cleanupDone = true;
                // we try with a full copy of the index
                LOG.warn("Replication attempt was not successful - trying a full index replication reloadCore={}", reloadCore);
                successfulInstall = fetchLatestIndex(true, reloadCore).getSuccessful();
            }
            markReplicationStop();
            return successfulInstall ? IndexFetchResult.INDEX_FETCH_SUCCESS : IndexFetchResult.INDEX_FETCH_FAILURE;
        } catch (ReplicationHandlerException e) {
            LOG.error("User aborted Replication");
            return new IndexFetchResult(IndexFetchResult.FAILED_BY_EXCEPTION_MESSAGE, false, e);
        } catch (SolrException e) {
            throw e;
        } catch (InterruptedException e) {
            throw new InterruptedException("Index fetch interrupted");
        } catch (Exception e) {
            throw new SolrException(ErrorCode.SERVER_ERROR, "Index fetch failed : ", e);
        }
    } finally {
        if (!cleanupDone) {
            cleanup(solrCore, tmpIndexDir, indexDir, deleteTmpIdxDir, tmpTlogDir, successfulInstall);
        }
    }
}

Example 42 with IndexCommit

use of org.apache.lucene.index.IndexCommit in project lucene-solr by apache.

the class ReplicationHandler method getCommits.

private List<NamedList<Object>> getCommits() {
    Map<Long, IndexCommit> commits = core.getDeletionPolicy().getCommits();
    List<NamedList<Object>> l = new ArrayList<>();
    for (IndexCommit c : commits.values()) {
        try {
            NamedList<Object> nl = new NamedList<>();
            nl.add("indexVersion", IndexDeletionPolicyWrapper.getCommitTimestamp(c));
            nl.add(GENERATION, c.getGeneration());
            List<String> commitList = new ArrayList<>(c.getFileNames().size());
            commitList.addAll(c.getFileNames());
            Collections.sort(commitList);
            nl.add(CMD_GET_FILE_LIST, commitList);
            l.add(nl);
        } catch (IOException e) {
            LOG.warn("Exception while reading files for commit " + c, e);
        }
    }
    return l;
}

Example 43 with IndexCommit

use of org.apache.lucene.index.IndexCommit in project lucene-solr by apache.

the class ReplicationHandler method getEventListener.

/**
   * Register a listener for postcommit/optimize
   *
   * @param snapshoot do a snapshoot
   * @param getCommit get a commitpoint also
   *
   * @return an instance of the eventlistener
   */
private SolrEventListener getEventListener(final boolean snapshoot, final boolean getCommit) {
    return new SolrEventListener() {

        @Override
        public void init(NamedList args) {
        /*no op*/
        }

        /**
       * This refreshes the latest replicateable index commit and optionally can create Snapshots as well
       */
        @Override
        public void postCommit() {
            IndexCommit currentCommitPoint = core.getDeletionPolicy().getLatestCommit();
            if (getCommit) {
                // IndexCommit oldCommitPoint = indexCommitPoint;
                indexCommitPoint = currentCommitPoint;
            // We don't need to save commit points for replication, the SolrDeletionPolicy
            // always saves the last commit point (and the last optimized commit point, if needed)
            /***
          if (indexCommitPoint != null) {
            core.getDeletionPolicy().saveCommitPoint(indexCommitPoint.getGeneration());
          }
          if(oldCommitPoint != null){
            core.getDeletionPolicy().releaseCommitPointAndExtendReserve(oldCommitPoint.getGeneration());
          }
          ***/
            }
            if (snapshoot) {
                try {
                    int numberToKeep = numberBackupsToKeep;
                    if (numberToKeep < 1) {
                        numberToKeep = Integer.MAX_VALUE;
                    }
                    SnapShooter snapShooter = new SnapShooter(core, null, null);
                    snapShooter.validateCreateSnapshot();
                    snapShooter.createSnapAsync(currentCommitPoint, numberToKeep, (nl) -> snapShootDetails = nl);
                } catch (Exception e) {
                    LOG.error("Exception while snapshooting", e);
                }
            }
        }

        @Override
        public void newSearcher(SolrIndexSearcher newSearcher, SolrIndexSearcher currentSearcher) {
        /*no op*/
        }

        @Override
        public void postSoftCommit() {
        }
    };
}

Example 44 with IndexCommit

use of org.apache.lucene.index.IndexCommit in project lucene-solr by apache.

the class ReplicationHandler method getFileList.

@SuppressWarnings("unchecked")
private void getFileList(SolrParams solrParams, SolrQueryResponse rsp) {
    String v = solrParams.get(GENERATION);
    if (v == null) {
        rsp.add("status", "no index generation specified");
        return;
    }
    long gen = Long.parseLong(v);
    IndexCommit commit = core.getDeletionPolicy().getCommitPoint(gen);
    //System.out.println("ask for files for gen:" + commit.getGeneration() + core.getCoreDescriptor().getCoreContainer().getZkController().getNodeName());
    if (commit == null) {
        rsp.add("status", "invalid index generation");
        return;
    }
    // reserve the indexcommit for sometime
    core.getDeletionPolicy().setReserveDuration(gen, reserveCommitDuration);
    List<Map<String, Object>> result = new ArrayList<>();
    Directory dir = null;
    try {
        dir = core.getDirectoryFactory().get(core.getNewIndexDir(), DirContext.DEFAULT, core.getSolrConfig().indexConfig.lockType);
        SegmentInfos infos = SegmentInfos.readCommit(dir, commit.getSegmentsFileName());
        for (SegmentCommitInfo commitInfo : infos) {
            for (String file : commitInfo.files()) {
                Map<String, Object> fileMeta = new HashMap<>();
                fileMeta.put(NAME, file);
                fileMeta.put(SIZE, dir.fileLength(file));
                try (final IndexInput in = dir.openInput(file, IOContext.READONCE)) {
                    try {
                        long checksum = CodecUtil.retrieveChecksum(in);
                        fileMeta.put(CHECKSUM, checksum);
                    } catch (Exception e) {
                        LOG.warn("Could not read checksum from index file: " + file, e);
                    }
                }
                result.add(fileMeta);
            }
        }
        // add the segments_N file
        Map<String, Object> fileMeta = new HashMap<>();
        fileMeta.put(NAME, infos.getSegmentsFileName());
        fileMeta.put(SIZE, dir.fileLength(infos.getSegmentsFileName()));
        if (infos.getId() != null) {
            try (final IndexInput in = dir.openInput(infos.getSegmentsFileName(), IOContext.READONCE)) {
                try {
                    fileMeta.put(CHECKSUM, CodecUtil.retrieveChecksum(in));
                } catch (Exception e) {
                    LOG.warn("Could not read checksum from index file: " + infos.getSegmentsFileName(), e);
                }
            }
        }
        result.add(fileMeta);
    } catch (IOException e) {
        rsp.add("status", "unable to get file names for given index generation");
        rsp.add(EXCEPTION, e);
        LOG.error("Unable to get file names for indexCommit generation: " + gen, e);
    } finally {
        if (dir != null) {
            try {
                core.getDirectoryFactory().release(dir);
            } catch (IOException e) {
                SolrException.log(LOG, "Could not release directory after fetching file list", e);
            }
        }
    }
    rsp.add(CMD_GET_FILE_LIST, result);
    // fetch list of tlog files only if cdcr is activated
    if (solrParams.getBool(TLOG_FILES, true) && core.getUpdateHandler().getUpdateLog() != null && core.getUpdateHandler().getUpdateLog() instanceof CdcrUpdateLog) {
        try {
            List<Map<String, Object>> tlogfiles = getTlogFileList(commit);
            LOG.info("Adding tlog files to list: " + tlogfiles);
            rsp.add(TLOG_FILES, tlogfiles);
        } catch (IOException e) {
            rsp.add("status", "unable to get tlog file names for given index generation");
            rsp.add(EXCEPTION, e);
            LOG.error("Unable to get tlog file names for indexCommit generation: " + gen, e);
        }
    }
    if (confFileNameAlias.size() < 1 || core.getCoreContainer().isZooKeeperAware())
        return;
    LOG.debug("Adding config files to list: " + includeConfFiles);
    //if configuration files need to be included get their details
    rsp.add(CONF_FILES, getConfFileInfoFromCache(confFileNameAlias, confFileInfoCache));
}

Example 45 with IndexCommit

use of org.apache.lucene.index.IndexCommit in project lucene-solr by apache.

the class ReplicationHandler method doSnapShoot.

private void doSnapShoot(SolrParams params, SolrQueryResponse rsp, SolrQueryRequest req) {
    try {
        int numberToKeep = params.getInt(NUMBER_BACKUPS_TO_KEEP_REQUEST_PARAM, 0);
        if (numberToKeep > 0 && numberBackupsToKeep > 0) {
            throw new SolrException(ErrorCode.BAD_REQUEST, "Cannot use " + NUMBER_BACKUPS_TO_KEEP_REQUEST_PARAM + " if " + NUMBER_BACKUPS_TO_KEEP_INIT_PARAM + " was specified in the configuration.");
        }
        numberToKeep = Math.max(numberToKeep, numberBackupsToKeep);
        if (numberToKeep < 1) {
            numberToKeep = Integer.MAX_VALUE;
        }
        IndexCommit indexCommit = null;
        String commitName = params.get(CoreAdminParams.COMMIT_NAME);
        if (commitName != null) {
            SolrSnapshotMetaDataManager snapshotMgr = core.getSnapshotMetaDataManager();
            Optional<IndexCommit> commit = snapshotMgr.getIndexCommitByName(commitName);
            if (commit.isPresent()) {
                indexCommit = commit.get();
            } else {
                throw new SolrException(ErrorCode.BAD_REQUEST, "Unable to find an index commit with name " + commitName + " for core " + core.getName());
            }
        } else {
            IndexDeletionPolicyWrapper delPolicy = core.getDeletionPolicy();
            indexCommit = delPolicy.getLatestCommit();
            if (indexCommit == null) {
                indexCommit = req.getSearcher().getIndexReader().getIndexCommit();
            }
        }
        String location = params.get(CoreAdminParams.BACKUP_LOCATION);
        String repoName = params.get(CoreAdminParams.BACKUP_REPOSITORY);
        CoreContainer cc = core.getCoreContainer();
        BackupRepository repo = null;
        if (repoName != null) {
            repo = cc.newBackupRepository(Optional.of(repoName));
            location = repo.getBackupLocation(location);
            if (location == null) {
                throw new IllegalArgumentException("location is required");
            }
        } else {
            repo = new LocalFileSystemRepository();
            if (location == null) {
                location = core.getDataDir();
            } else {
                location = core.getCoreDescriptor().getInstanceDir().resolve(location).normalize().toString();
            }
        }
        // small race here before the commit point is saved
        URI locationUri = repo.createURI(location);
        SnapShooter snapShooter = new SnapShooter(repo, core, locationUri, params.get(NAME), commitName);
        snapShooter.validateCreateSnapshot();
        snapShooter.createSnapAsync(indexCommit, numberToKeep, (nl) -> snapShootDetails = nl);
    } catch (Exception e) {
        LOG.warn("Exception during creating a snapshot", e);
        rsp.add("exception", e);
    }
}