public synchronized void flush()

in flink-connector-mongodb/src/main/java/org/apache/flink/connector/mongodb/sink/writer/MongoWriter.java [166:174]


    public synchronized void flush(boolean endOfInput) throws IOException {
        checkFlushException();

        checkpointInProgress = true;
        while (!bulkRequests.isEmpty() && (flushOnCheckpoint || endOfInput)) {
            doBulkWrite();
        }
        checkpointInProgress = false;
    }