[英]IO Error: Connection timed out in spring boot after sometime of deploy JAR file?
[英]Spring Boot REST API server Connection timed out sometime
I'm testing my Spring Boot REST API server with Apache JMeter.
大多数“连接时间”在 10 毫秒内,但有时会发生连接超时。
JMeter 的设置
- Thread
Number of Threads : 500
Ramp-Up Period : 50
- HTTP Request
Connect timeout : 20000ms
Response timeout : 40000ms
- Constant timer
Thread delay : 1000ms
CentOS7 设置
open files (-n) 65535
max user processes (-u) 65535
Java 执行设置
-Xmx8g -Xms4g -Xmn2g -XX:PermSize=512m -XX:SurvivorRatio=16
Spring 启动应用程序.properties Tomcat 设置
server.tomcat.connection-timeout=20000
server.tomcat.max-connections=100000
server.tomcat.threads.max=10000
server.tomcat.threads.min-spare=2500
server.tomcat.accept-count=10000
JMeter 最多可以正常工作 10,000~20,000 个请求,但之后会出现连接超时。
Starting standalone test @ Fri Apr 16 09:30:29 KST 2021 (1618533029412)
Waiting for possible Shutdown/StopTestNow/HeapDump/ThreadDump message on port 4445
summary + 1 in 00:00:03 = 0.4/s Avg: 1319 Min: 1319 Max: 1319 Err: 0 (0.00%) Active: 127 Started: 127 Finished: 0
summary + 8771 in 00:00:28 = 318.5/s Avg: 398 Min: 236 Max: 4191 Err: 0 (0.00%) Active: 500 Started: 500 Finished: 0
summary = 8772 in 00:00:30 = 290.3/s Avg: 398 Min: 236 Max: 4191 Err: 0 (0.00%)
summary + 9349 in 00:00:30 = 311.6/s Avg: 534 Min: 237 Max: 3582 Err: 0 (0.00%) Active: 500 Started: 500 Finished: 0
summary = 18121 in 00:01:00 = 300.9/s Avg: 468 Min: 236 Max: 4191 Err: 0 (0.00%)
summary + 5872 in 00:00:30 = 195.7/s Avg: 1494 Min: 235 Max: 20855 Err: 10 (0.17%) Active: 500 Started: 500 Finished: 0
summary = 23993 in 00:01:30 = 265.9/s Avg: 719 Min: 235 Max: 20855 Err: 10 (0.04%)
org.apache.http.conn.HttpHostConnectException: Connect to <IP Address>:<Port> [/112.220.184.107] failed: Connection timed out: connect
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:156)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl$JMeterDefaultHttpClientConnectionOperator.connect(HTTPHC4Impl.java:336)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:374)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.executeRequest(HTTPHC4Impl.java:843)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:574)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:67)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1231)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1220)
at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:622)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:546)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:607)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
... 19 more
你能告诉我为什么会这样吗?
summary + 5872 in 00:00:30 = 195.7/s Avg: 1494 Min: 235 Max: 20855 Err: 10 (0.17%) Active: 500 Started: 500 Finished: 0
^^^^^^^
您的响应时间增加到 20 秒以上,因此 Tomcat 拒绝连接(很可能该设置可以防止慢速 HTTP 攻击
要么将其设置为-1
以禁用它,要么使用分析器工具查看导致应用程序/tomcat 端出现问题的原因。
此外 JMeter 命令行 output 并不能说明全部情况,我建议从 .jtl 结果文件中生成一些图表,例如Response Times Over Time 、 Active Threads Over Time 、 Transactions per Second等,以便您可以关联各种性能指标. 监视服务器端操作系统健康指标(如 CPU、RAM、网络、交换、磁盘使用情况以及 JVM JMX 指标)也是一个好主意,可以使用即JMeter PerfMon 插件来完成
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