Github user jinossy commented on a diff in the pull request:
https://github.com/apache/tajo/pull/884#discussion_r47183366
--- Diff:
tajo-core/src/main/java/org/apache/tajo/worker/ExecutionBlockContext.java ---
@@ -191,10 +197,59 @@ public void stop(){
}
tasks.clear();
taskHistories.clear();
+
+ // Clear index cache in pull server
+ clearIndexCache();
+
resource.release();
RpcClientManager.cleanup(queryMasterClient);
}
+ private void clearIndexCache() {
+ if (executionBlockId.getId() > 1) {
+ Bootstrap bootstrap = new Bootstrap()
+
.group(NettyUtils.getSharedEventLoopGroup(NettyUtils.GROUP.FETCHER, 1))
+ .channel(NioSocketChannel.class)
+ .option(ChannelOption.ALLOCATOR, NettyUtils.ALLOCATOR)
+ .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10 * 1000)
+ .option(ChannelOption.TCP_NODELAY, true);
+ ChannelInitializer<Channel> initializer = new
ChannelInitializer<Channel>() {
+ @Override
+ protected void initChannel(Channel channel) throws Exception {
+ ChannelPipeline pipeline = channel.pipeline();
+ pipeline.addLast("codec", new HttpClientCodec());
+ }
+ };
+ bootstrap.handler(initializer);
+
+ WorkerConnectionInfo connInfo = workerContext.getConnectionInfo();
+ ChannelFuture future = bootstrap.connect(new
InetSocketAddress(connInfo.getHost(), connInfo.getPullServerPort()))
+ .addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
+
+ try {
+ Channel channel = future.await().channel();
+ if (!future.isSuccess()) {
+ // Upon failure to connect to pull server, cache clear message
is just ignored.
+ LOG.warn(future.cause());
+ return;
+ }
+
+ ExecutionBlockId clearEbId = new
ExecutionBlockId(executionBlockId.getQueryId(), executionBlockId.getId() - 1);
+ HttpRequest request = new DefaultHttpRequest(HttpVersion.HTTP_1_1,
HttpMethod.DELETE, clearEbId.toString());
+ request.headers().set(Names.HOST, connInfo.getHost());
+ request.headers().set(Names.CONNECTION, Values.CLOSE);
+ channel.writeAndFlush(request);
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ } finally {
+ if (future != null && future.channel().isOpen()) {
+ // Close the channel to exit.
+ future.channel().closeFuture();
--- End diff --
It should be `future.channel().close()`
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