Examples with RegionTaskException com.pingcap.tikv.exception.RegionTaskException used on opensource projects

Example 1 with RegionTaskException

use of com.pingcap.tikv.exception.RegionTaskException in project tispark by pingcap.

the class DAGIterator method process.

private SelectResponse process(RangeSplitter.RegionTask regionTask) {
    Queue<RangeSplitter.RegionTask> remainTasks = new ArrayDeque<>();
    Queue<SelectResponse> responseQueue = new ArrayDeque<>();
    remainTasks.add(regionTask);
    BackOffer backOffer = ConcreteBackOffer.newCopNextMaxBackOff();
    HashSet<Long> resolvedLocks = new HashSet<>();
    // the remaining tasks.
    while (!remainTasks.isEmpty()) {
        RangeSplitter.RegionTask task = remainTasks.poll();
        if (task == null) {
            continue;
        }
        List<Coprocessor.KeyRange> ranges = task.getRanges();
        TiRegion region = task.getRegion();
        Metapb.Store store = task.getStore();
        try {
            RegionStoreClient client = session.getRegionStoreClientBuilder().build(region, store, storeType);
            client.addResolvedLocks(startTs, resolvedLocks);
            Collection<RangeSplitter.RegionTask> tasks = client.coprocess(backOffer, dagRequest, region, ranges, responseQueue, startTs);
            if (tasks != null) {
                remainTasks.addAll(tasks);
            }
            resolvedLocks.addAll(client.getResolvedLocks(startTs));
        } catch (Throwable e) {
            // Handle region task failed
            logger.error("Process region tasks failed, remain " + remainTasks.size() + " tasks not executed due to", e);
            // Rethrow to upper levels
            throw new RegionTaskException("Handle region task failed:", e);
        }
    }
    // Add all chunks to the final result
    List<Chunk> resultChunk = new ArrayList<>();
    EncodeType encodeType = null;
    while (!responseQueue.isEmpty()) {
        SelectResponse response = responseQueue.poll();
        if (response != null) {
            encodeType = response.getEncodeType();
            resultChunk.addAll(response.getChunksList());
        }
    }
    return SelectResponse.newBuilder().addAllChunks(resultChunk).setEncodeType(encodeType).build();
}