在grpc java/node上处理客户端和服务器错误
问题描述:
我正在使用grpc在Java服务器和节点客户端之间进行通信。当他们中的任何一方死亡时,另一方死亡。在grpc java/node上处理客户端和服务器错误
这里是抛出的Java服务器上的异常,当节点的客户端死机 -
Nov 08, 2016 11:28:03 AM io.grpc.netty.NettyServerHandler onConnectionError
WARNING: Connection Error
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:192)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:288)
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1100)
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:349)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:112)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:571)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:512)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:426)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:398)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:877)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
at java.lang.Thread.run(Thread.java:745)
这里是扔在节点异常时,Java的死亡:
events.js:141
throw er; // Unhandled 'error' event
^
Error: {"created":"@1478623914.082000000","description":"An existing connection was forcibly closed by the remote host.\r\n","file":"..\src\core\lib\iomgr\tcp_windows.c","file_line":171,"grpc_status":14}
at ClientReadableStream._emitStatusIfDone ( C:\HarshalDev\Live_TDFX\TDSL0007-TDFXPlatfo rmsDesignandBuild\tdfxlive\node_modules\grpc\src\node\src\client.js:189:19)
at ClientReadableStream._receiveStatus (C:\ HarshalDev\Live_TDFX\TDSL0007-TDFXPlatformsDesignandBuild\tdfxlive\node_modules\grpc\src\node\src\client.js:169:8)
at C:\HarshalDev\Live_TDFX\TDSL0007-TDFXPlatformsDesignandBuild\tdfxlive\node_modules\grpc\src\node\src\client.js:577:14
[nodemon] app crashed - waiting for file changes before starting...
的问题 - 如何处理这些异常?
我尝试没有任何成功添加try/catch并为线程添加未捕获的异常处理程序。
Java代码来初始化 -
ServerBuilder<?> serverBuilder = ServerBuilder.forPort(getPort());
server = serverBuilder
.addService(createBwayStreamingService())
.addService(ServerInterceptors.intercept(createBwayOrderService(), authServerInterceptor))
.addService(createBwayInstrumentService())
.addService(createBwaySettlementService())
.addService(createBwayDateTimeService())
.addService(ServerInterceptors.intercept(createBwayConfService(), authServerInterceptor))
.addService(ServerInterceptors.intercept(createBwayTradeService(), authServerInterceptor))
.addService(ServerInterceptors.intercept(createBwayAuthService(), authServerInterceptor))
.build();
Preconditions.checkNotNull(server);
server.start();
System.out.println("Server started, listening on " + getPort());
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
System.out.println("Shutting down gRPC server");
TocGateway.this.stop();
System.out.println("Server shut down");
}
});
server.awaitTermination();
节点客户端处理程序(的服务之一,所有其他服务都使用相同的模式) -
let protoDescriptorStreaming = grpc.load((process.env.FX_LIVE_PROTO_DIR || '../tocGateway/src/main/proto') + '/streaming.proto');
let streamingService = new protoDescriptorStreaming.tds.fxlive.bway.BwayStreamService(process.env.TOC_GATEWAY_ADDRESS || 'localhost:8087', grpc.credentials.createInsecure());
答
Java的警告是无害的。发生异常后,应用程序应继续正常运行。将日志级别降低到减少logspam会很好,但它也不应该影响应用程序的正确性。
在Node方面,我和OP一样苦恼,但答案是我没有处理错误事件。修复后,我的Node应用程序将在错误发生后继续运行。 –
如果您在学习grpc时遇到此问题,那是因为您没有优雅地终止客户端 - .channel.shutdown.awaitTermination(5,TimeUnit.SECONDS)请参阅http://comments.gmane.org/gmane.comp.lib。 GRPC/2474 –