System.out.println("ZooKeeper session established..."); } catch (Exception e) { e.printStackTrace(); } } /** * 获取分布式锁 * * @param productId */ public Boolean acquireDistributedLock(Long productId) { String path = "/product-lock-" + productId; try { zookeeper.create(path, ""....
golang runtime 简析 Go Runtime 的总览 golang 的 runtime 在 golang 中的地位类似于 Java 的虚拟机,不过 go runtime 不是虚拟机. golang 程序生成可执行文件在指定平台上即可运行,效率很高, 它和 c/c++ 一样编译出来的是二进制可执行文件. 我们知道运行 golang 的程序并不需要主机安装有类似 Java 虚拟...
Out of memoryConcurrent map writesStack memory exhaustionAttempting to launch a nil function as a goroutineAll goroutines are asleep - deadlockThread limit exhaustion 参考：[1] https://go-review.googlesource.com/c/go/+/390421 [2] https://github.com/golang/go/blob/master/src/runtim...
2、go channel 的底层实现原理 （数据结构）底层结构需要描述出来，这个简单，buf，发送队列，接收队列，...
Out of memory Concurrent map writes Stack memory exhaustion Attempting to launch anilfunction as a goroutine All goroutines are asleep - deadlock Thread limit exhaustion 参考: [1]https://go-review.googlesource.com/c/go/+/390421 [2]https://github.com/golang/go/blob/master/src/runtime/map...
=nil{returnerr}evl.Lock()evl.svr=newServer(npln,evl.opts,evl.quit)// 开启所有的epoll,然后异步协程阻塞等待evl.svr.Run()evl.Unlock()// 阻塞住err=evl.waitQuit()// ensure evl will not be finalized until Serve returnsruntime.SetFinalizer(evl,nil)returnerr}...
package mainimport ("fmt""sync""time")func printAndSleep(m *sync.Mutex, x int) { m.Lock()defer m.Unlock() fmt.Println(x) time.Sleep(time.Second)}func main() { m := &sync.Mutex{}for i :=; i < 10; i++ { printAndSleep(m, i) }}goroutine 不仅容易启动，...
timeout(time:120,unit:'SECONDS') { waitUntil { try { return true } catch(exception) { return false } } } 11.并发处理 1.使用 lock 步骤对资源加锁 //提供资源的名字作为默认参数 lock('worker_node1') { //... } //标签,资源的数量 lock(label:'doker-node', quantity:3) { //.. }...
// 在driver.Conn的基础上多一层封装可以实现在driver.Conn的基础上,加持上状态信息,如下conn.inUse =truedb.mu.Unlock()// 检查是否过期ifconn.expired(lifetime) {conn.Close()returnnil, driver.ErrBadConn}// Lock around reading lastErr to ensure the session resetter finished.// 加锁处理,确保这个...
var mu sync.RWMutex … mu.RLock() defer mu.RUnlock() conns := h.all_connections[img_id] for _, c := range conns { if c == nil /*|| c.uid == uid */ { continue } select { case c.send <- []byte(message): default: h.conn_unregister(c) } } ...