第一个参数是命名系统中消息队列的键,使用ftok创建;第二个参数用于为消息队列分配权限。 msgsnd(int msqid, const void *msg_ptr, size_t msg_sz, int msgflg): 用于发送消息到消息队列。最后一个参数控制在消息队列已满或达到排队消息的系统限制时会发生什么情况。 msgrcv(int msqid, void *msg_ptr, size_...
Handler线程从callQueue队列中取出请求,解析请求的内容,调用相应的接口实现,将response内容交给Responder线程; Responder线程负责将response送出。 Reader的个数由ipc.server.read.threadpool.size决定,默认为1;(为什么默认只使用1个reader?猜测因jvm 1.6开始epoll已经成为默认的nio selector,1个就够了) Handler的个数在...
private int maxQueueSize; private final int maxRespSize; private int socketSendBufferSize; private final boolean tcpNoDelay; // if T then disable Nagle's Algorithm volatile private boolean running = true; // true while server runs private BlockingQueue<Call> callQueue; // queued calls private ...
下面是一个使用信号进行进程间通信的示例代码: #include<stdio.h>#include<signal.h>#include<unistd.h>voidsignal_handler(intsig){printf("Received signal: %d\n",sig);}intmain(){// 注册信号处理函数signal(SIGINT,signal_handler);printf("Running...\n");while(1){// 无限循环}return0;} 在上述示...
main_mediaserver.cpp MediaPlayerService.cpp (二)、概述 由于服务注册会涉及到具体的服务注册,网上大多数说的都是Media注册服务,我们也说它。 media入口函数是 “main_mediaserver.cpp”中的main()方法,代码如下: 代码语言:javascript 代码运行次数:0
RPC返回response的Handler处理慢问题 在笔者遇到的生产场景中,时不时就会出现NameNode callqueue满的情况,但是它的process time其实并没有显示出特别慢的迹象。在最一开始,笔者也是自然怀疑的是NameNode锁的问题,后来经过了一系列的锁局部优化后,还是偶尔会遇到NameNode慢的问题。
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304) Wed Aug 04 11:08:45 CST 2021, RpcRetryingCaller{globalStartTime=1628046524855, pause=100, maxAttempts=2}, org.apache.hadoop.hbase.ipc.ServerNotRunningYetException: org.apache.hadoop.hbase.ipc.ServerNotRunningYetExcept...
queue id:131076 TimeOut occure in boot_proc. Program exit. TimeOut occure in boot_proc. Program exit. ApproDrvExit: 7 Error: WaitStreamReady Fail. Error: SemWait: Invalid Semaphore handler 向上0True向下 Robin Edson Intellectual1000points ...
In order for you to use POSIX message queues in QNX Neutrino, the message queue server must be running. QNX Neutrino has two implementations of message queues: a “traditional” implementation that uses the mqueue resource manager (see the Resource Managers chapter in this book) an alternate...
WARNING 2: Up to and including perl v5.6.1, doing almost anything in a signal handler could be dangerous. The most safe code avoids all mallocs and system calls, usually by preallocating a flag before entering the signal handler, altering the flag's value in the handler, and responding to...