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V2EX  ›  huxiweng  ›  全部回复第 5 页 / 共 16 页
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2019-02-15 20:29:30 +08:00
回复了 huxiweng 创建的主题 问与答 第一套房,装修求推荐清单
主要是餐桌、床、电视、洗衣机、冰箱、空调等软装
2018-09-27 09:50:57 +08:00
回复了 huxiweng 创建的主题 Java 这是死锁?
@xixinimei

改成下面单例,好像死锁了。。。


private static OkHttpClient okHttpClient = null;


private HttpTool() {
}

public static OkHttpClient getInstance() {
if (okHttpClient == null) {
//加同步安全
synchronized (HttpTool.class) {
if (okHttpClient == null) {
//判空 为空创建实例
okHttpClient = new OkHttpClient();
}
}

}

return okHttpClient;
}


jstack 日志:
2018-09-27 08:01:43
Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.80-b11 mixed mode):

"Attach Listener" daemon prio=10 tid=0x00007f5d1c001000 nid=0x11ba runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"Okio Watchdog" daemon prio=10 tid=0x00007f5d14924800 nid=0x117c in Object.wait() [0x00007f5d20e12000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007889c4fd8> (a java.lang.Class for okio.AsyncTimeout)
at okio.AsyncTimeout$Companion.awaitTimeout$jvm(AsyncTimeout.kt:341)
at okio.AsyncTimeout$Watchdog.run(AsyncTimeout.kt:228)
- locked <0x00000007889c4fd8> (a java.lang.Class for okio.AsyncTimeout)

"Java2D Disposer" daemon prio=10 tid=0x00007f5d1491e800 nid=0x110d in Object.wait() [0x00007f5d20131000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x0000000788ba7c48> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
- locked <0x0000000788ba7c48> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
at sun.java2d.Disposer.run(Disposer.java:145)
at java.lang.Thread.run(Thread.java:745)

"New I/O worker #8" prio=10 tid=0x00007f5d0c014000 nid=0x110c runnable [0x00007f5d2070b000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x00000007fbf15d98> (a sun.nio.ch.Util$2)
- locked <0x00000007fbf15d88> (a java.util.Collections$UnmodifiableSet)
- locked <0x00000007fbf02948> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:52)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:208)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:38)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

"New I/O worker #7" prio=10 tid=0x00007f5d0c011800 nid=0x110b runnable [0x00007f5d2080c000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x000000078859c718> (a sun.nio.ch.Util$2)
- locked <0x000000078859c708> (a java.util.Collections$UnmodifiableSet)
- locked <0x000000078855fb30> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:52)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:208)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:38)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

"New I/O worker #6" prio=10 tid=0x00007f5d0c010000 nid=0x110a runnable [0x00007f5d2090d000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x00000007fbf0fe28> (a sun.nio.ch.Util$2)
- locked <0x00000007fbf0fe18> (a java.util.Collections$UnmodifiableSet)
- locked <0x00000007fbf0d818> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:52)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:208)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:38)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

"New I/O worker #5" prio=10 tid=0x00007f5d0c003800 nid=0x1109 runnable [0x00007f5d20a0e000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x00000007885c1230> (a sun.nio.ch.Util$2)
- locked <0x00000007885c1220> (a java.util.Collections$UnmodifiableSet)
- locked <0x00000007885b1078> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:52)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:208)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:38)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
2018-09-26 15:16:10 +08:00
回复了 huxiweng 创建的主题 Java 这是死锁?
@xixinimei

okhttp-3.11.0.jar 应该是 3.11.0 版本

3 楼你说的我有点晕,意思是 jstack 打印的内容里的:
"OkHttp ConnectionPool" daemon prio=10 tid=0x00007f5b2c300000 nid=0x752 in Object.wait() [0x00007f5af35f4000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
是没有问题的是吗?可以不用管?

然后是我自己写的方法,调用一次 sendPostOKHttp()方法就创建一个 OkHttpClient,然后由于 OkHttpClient 对象太多,就有 N 个线程(还是线程池)?这样理解对吗?

*****

所以我的代码要改一下:
把 OkHttpClient client = new OkHttpClient();定义到类成员变量,然后每次使用这个对象调用剩下的代码?
这样理解对吗?
2018-09-26 13:33:48 +08:00
回复了 huxiweng 创建的主题 Java 这是死锁?
@xixinimei 怎么会 wait 呢,啥事都没做,就用 okhttp 发送 http 请求,怎么这么多 wait 的,TCP 连接数不断上涨,感觉跟这 okhttp 有很大关系。

代码:

/**
* 向指定 URL 发送 POST 方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPostOKHttp(String url, String param) {

logger.info("sendPostOKHttp()");
OkHttpClient client = new OkHttpClient();

// 1.构建 RequestBody
RequestBody body = RequestBody.create(MediaType.parse("text/xml;charset=UTF-8"),param);

Request request = new Request.Builder().url(url).post(body).build();
Response response = null;
try {
response = client.newCall(request).execute();
return response.body().string();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}

/**
* 处理 http 请求( GET/POST )
*
* @param reqUrl 请求地址
* @param reqMethod 请求方式( GET/POST )
* @param outputStr 参数( JSON String )
* @return
*/
public static String httpReqOKHttp(String reqUrl, String reqMethod, String outputStr) {
logger.info("httpReqOKHttp()");

String returnStr = "";

if ("POST".equalsIgnoreCase(reqMethod)) {
MediaType JSON = MediaType.get("application/json; charset=utf-8");
OkHttpClient client = new OkHttpClient();
RequestBody body = RequestBody.create(JSON, outputStr);
Request request = new Request.Builder().url(reqUrl).post(body).build();
Response response = null;
try {
response = client.newCall(request).execute();
returnStr = response.body().string();
} catch (IOException e) {
e.printStackTrace();
logger.error(e.getStackTrace());
}
}

if ("GET".equalsIgnoreCase(reqMethod)) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(reqUrl).build();

Response response = null;
try {
response = client.newCall(request).execute();
returnStr = response.body().string();
} catch (IOException e) {
logger.error(e.getStackTrace());
}
}
return returnStr;
}

/**
* 向指定 URL 发送 GET 方法的请求
*
* @param url 发送请求的 URL
* @return URL 所代表远程资源的响应结果
*/
public static String sendGetOKHttp(String url) {
logger.info("sendGetOKHttp()");
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();

Response response = null;
try {
response = client.newCall(request).execute();
return response.body().string();
} catch (IOException e) {
e.printStackTrace();
}

return "";
}
2017-11-30 16:29:32 +08:00
回复了 k9982874 创建的主题 分享发现 山东移动成功转 8 元 4G 飞享套餐
正在尝试,成功过来更新,hhh
Play! Framework 1.x
ActFramework
2017-09-06 14:17:02 +08:00
回复了 xuezher 创建的主题 程序员 朋友公司的数据遭到勒索病毒攻击,黑客张嘴就要 2 个币....
给钱也没用的
2017-05-26 14:49:44 +08:00
回复了 assad 创建的主题 汽车 18-23 万,买个什么车比较好?
4008
2017-05-12 10:59:41 +08:00
回复了 jason19659 创建的主题 职场话题 一个同学,来上海三个月了,待业
这简历换谁都不会要
2017-05-12 09:53:59 +08:00
回复了 beakey 创建的主题 问与答 ofo 客服明确说不给退押金,去哪里投诉?
我中的奖快一个月了也杳无音讯。
2017-05-11 16:02:55 +08:00
回复了 zjin42 创建的主题 酷工作 速递服务类 App 招技术合伙人, 有创业想法的来看看
好像找了有俩月了吧,找不到合适的可以走招聘途径。
只是好奇你的项目,绑定一下。
;-)
2017-05-11 15:56:21 +08:00
回复了 Livid 创建的主题 使用指南 对云计算公司在 V2EX 进行推广活动的一些建议
因为发这些的都是不懂技术的运营
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