@Override public void messageReceived(RecoveryCleanFilesRequest request, TransportChannel channel) throws Exception { try (RecoveriesCollection.StatusRef statusRef = onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) { final RecoveryStatus recoveryStatus = statusRef.status(); recoveryStatus.state().getTranslog().totalOperations(request.totalTranslogOps()); // first, we go and move files that were created with the recovery id suffix to // the actual names, its ok if we have a corrupted index here, since we have replicas // to recover from in case of a full cluster shutdown just when this code executes... recoveryStatus .indexShard() .deleteShardState(); // we have to delete it first since even if we fail to rename the // shard might be invalid recoveryStatus.renameAllTempFiles(); final Store store = recoveryStatus.store(); // now write checksums recoveryStatus.legacyChecksums().write(store); Store.MetadataSnapshot sourceMetaData = request.sourceMetaSnapshot(); try { store.cleanupAndVerify("recovery CleanFilesRequestHandler", sourceMetaData); } catch (CorruptIndexException | IndexFormatTooNewException | IndexFormatTooOldException ex) { // this is a fatal exception at this stage. // this means we transferred files from the remote that have not be checksummed and they // are // broken. We have to clean up this shard entirely, remove all files and bubble it up to // the // source shard since this index might be broken there as well? The Source can handle this // and checks // its content on disk if possible. try { try { store.removeCorruptionMarker(); } finally { Lucene.cleanLuceneIndex(store.directory()); // clean up and delete all files } } catch (Throwable e) { logger.debug("Failed to clean lucene index", e); ex.addSuppressed(e); } RecoveryFailedException rfe = new RecoveryFailedException( recoveryStatus.state(), "failed to clean after recovery", ex); recoveryStatus.fail(rfe, true); throw rfe; } catch (Exception ex) { RecoveryFailedException rfe = new RecoveryFailedException( recoveryStatus.state(), "failed to clean after recovery", ex); recoveryStatus.fail(rfe, true); throw rfe; } channel.sendResponse(TransportResponse.Empty.INSTANCE); } }