Examples with StopReplicationException com.torodb.mongodb.repl.oplogreplier.StopReplicationException used on opensource projects

Example 1 with StopReplicationException

use of com.torodb.mongodb.repl.oplogreplier.StopReplicationException in project torodb by torodb.

the class ContinuousOplogFetcher method fetch.

@Override
public OplogBatch fetch() throws StopReplicationException, RollbackReplicationException {
    if (state.isClosed()) {
        return FinishedOplogBatch.getInstance();
    }
    try {
        return retrier.retry(() -> {
            try {
                if (state.isClosed()) {
                    return FinishedOplogBatch.getInstance();
                }
                state.prepareToFetch();
                MongoCursor<OplogOperation> cursor = state.getLastUsedMongoCursor();
                Batch<OplogOperation> batch = cursor.tryFetchBatch();
                if (batch == null || !batch.hasNext()) {
                    Thread.sleep(1000);
                    batch = cursor.tryFetchBatch();
                    if (batch == null || !batch.hasNext()) {
                        return NotReadyForMoreOplogBatch.getInstance();
                    }
                }
                List<OplogOperation> fetchedOps = null;
                long fetchTime = 0;
                /*
           * As we already modify the cursor by fetching the batch, we cannot retry the whole block
           * (as the cursor would be reused and the previous batch will be discarted).
           *
           * Then, if we leave the following try section with an error, we need to discard the
           * cursor, so the next iteration starts from the last batch we returned. On the other
           * hand, if we finished successfully, then we need to update the state.
           */
                boolean successful = false;
                try {
                    fetchedOps = batch.asList();
                    fetchTime = batch.getFetchTime();
                    postBatchChecks(cursor, fetchedOps);
                    OplogBatch result = new NormalOplogBatch(fetchedOps, true);
                    successful = true;
                    return result;
                } finally {
                    if (!successful) {
                        cursor.close();
                    } else {
                        assert fetchedOps != null;
                        assert fetchTime != 0;
                        state.updateState(fetchedOps, fetchTime);
                    }
                }
            } catch (RestartFetchException ex) {
                //lets choose a new reader
                state.discardReader();
                //and then try again
                throw new RollbackException(ex);
            } catch (DeadCursorException ex) {
                //lets retry the whole block with the same reader
                throw new RollbackException(ex);
            } catch (StopReplicationException | RollbackReplicationException ex) {
                //do not try again
                throw new RetrierAbortException(ex);
            } catch (MongoServerException ex) {
                //TODO: Fix this violation on the abstraction!
                LOGGER.debug("Found an unwrapped MongodbServerException");
                //lets choose a new reader
                state.discardReader();
                //rollback and hopefully use another member
                throw new RollbackException(ex);
            } catch (MongoException | MongoRuntimeException ex) {
                LOGGER.warn("Catched an error while reading the remote " + "oplog: {}", ex.getLocalizedMessage());
                //lets choose a new reader
                state.discardReader();
                //rollback and hopefully use another member
                throw new RollbackException(ex);
            }
        }, Hint.CRITICAL, Hint.TIME_SENSIBLE);
    } catch (RetrierGiveUpException ex) {
        this.close();
        throw new StopReplicationException("Stopping replication after several attepts to " + "fetch the remote oplog", ex);
    } catch (RetrierAbortException ex) {
        this.close();
        Throwable cause = ex.getCause();
        if (cause != null) {
            if (cause instanceof StopReplicationException) {
                throw (StopReplicationException) cause;
            }
            if (cause instanceof RollbackReplicationException) {
                throw (RollbackReplicationException) cause;
            }
        }
        throw new StopReplicationException("Stopping replication after a unknown abort " + "exception", ex);
    }
}

Example 2 with StopReplicationException

use of com.torodb.mongodb.repl.oplogreplier.StopReplicationException in project torodb by torodb.

the class RecoveryService method applyOplog.

/**
   * Applies all the oplog operations stored on the remote server whose optime is higher than
   * <em>from</em> but lower or equal than <em>to</em>.
   *
   * @param myOplog
   * @param remoteOplog
   * @param to
   * @param from
   */
private void applyOplog(OplogReader remoteOplog, OpTime from, OpTime to) throws TryAgainException, MongoException, FatalErrorException {
    MongoCursor<OplogOperation> oplogCursor = remoteOplog.between(from, true, to, true);
    if (!oplogCursor.hasNext()) {
        throw new OplogStartMissingException(remoteOplog.getSyncSource());
    }
    OplogOperation firstOp = oplogCursor.next();
    if (!firstOp.getOpTime().equals(from)) {
        throw new TryAgainException("Remote oplog does not cointain our last operation");
    }
    OplogFetcher fetcher = new LimitedOplogFetcher(oplogCursor);
    ApplierContext context = new ApplierContext.Builder().setReapplying(true).setUpdatesAsUpserts(true).build();
    try {
        oplogApplier.apply(fetcher, context).waitUntilFinished();
    } catch (StopReplicationException | RollbackReplicationException | CancellationException | UnexpectedOplogApplierException ex) {
        throw new FatalErrorException(ex);
    }
    OpTime lastAppliedOptime;
    try (ReadOplogTransaction oplogTrans = oplogManager.createReadTransaction()) {
        lastAppliedOptime = oplogTrans.getLastAppliedOptime();
    }
    if (!lastAppliedOptime.equals(to)) {
        LOGGER.warn("Unexpected optime for last operation to apply. " + "Expected " + to + ", but " + lastAppliedOptime + " found");
    }
}