我们正在使用Spring Boot实现微服务架构
version: Finchley.M9
java:1.8
一切正常，但是最后一天，在UAT服务器中，我在进行健康检查时发现大多数Eureka客户端服务中都有一个奇怪的错误。它只是影响了一些进程间的伪装调用。它经常发生。
2019-01-21 17:46:21.567 INFO 5780 --- [tbeatExecutor-0] o.a.http.impl.client.DefaultHttpClient : I/O exception (java.net.BindException) caught when connecting to {}->http://<IP>:8761: Address already in use: connect
2019-01-21 17:46:21.567 INFO 5780 --- [tbeatExecutor-0] o.a.http.impl.client.DefaultHttpClient : Retrying connect to {}->http://<IP>:8761
2019-01-21 18:14:19.220 ERROR 5780 --- [tbeatExecutor-0] c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error
com.sun.jersey.api.client. : java.net.BindException: Address already in use: connect
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.8.7.jar!/:1.8.7]
at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.WebResource$Builder.put(WebResource.java:529) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.sendHeartBeat(AbstractJerseyEurekaHttpClient.java:102) ~[eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) ~[eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:89) ~[eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:846) [eureka-client-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1399) [eureka-client-1.8.7.jar!/:1.8.7]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.8.0_181]
at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.8.0_181]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_181]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_181]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_181]
Caused by: java.net.BindException: Address already in use: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_181]
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) ~[na:1.8.0_181]
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[na:1.8.0_181]
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[na:1.8.0_181]
at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_181]
at java.net.PlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_181]
at java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.8.0_181]
at java.net.Socket.connect(Unknown Source) ~[na:1.8.0_181]
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:134) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.5.jar!/:4.5.5]
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
... 26 common frames omitted
如果我们遇到“连接被拒绝”或“无法请求到任何已知服务器的异常”异常，这意味着eureka服务器已关闭，但是此“地址已在使用”异常背后的原因是什么，我在启动时发现了类似的异常同一端口中有两个微服务。
下面给出了eureka服务器的yml配置，
server:
port: 8761
spring:
application:
name: discovery-server
eureka:
instance:
hostname: ${DISCOVERY_SERVICE_HOST:127.0.0.1}
client:
register-with-eureka: false
fetch-registry: false
server:
wait-time-in-ms-when-sync-empty: 0
logging:
level:
root: info
org.app.discoveryserver: debug
file: ${LOG_PATH}/${spring.application.name}.log
还有eureka客户端中的配置，
#Config server config
spring:
cloud:
config:
discovery:
enabled: true
service-id: config-server
retry:
max-interval: 6000
max-attempts: 100
initial-interval: 10
# eureka client config
eureka:
instance:
hostname: ${SERVICE_RUNNING_HOST_NAME:127.0.0.1}
lease-renewal-interval-in-seconds: 1
lease-expiration-duration-in-seconds: 2
client:
serviceUrl:
defaultZone: http://${DISCOVERY_SERVICE_HOST:127.0.0.1}:8761/eureka/
我检查了eureka服务器，发现以下异常
2019-01-22 15:20:35.384 ERROR 8388 --- [get_localhost-5] c.n.e.cluster.ReplicationTaskProcessor : It seems to be a socket read timeout exception, it will retry later. if it continues to happen and some eureka node occupied all the cpu time, you should set property 'eureka.server.peer-node-read-timeout-ms' to a bigger value
com.sun.jersey.api.client.ClientHandlerException: java.net.SocketTimeoutException: Read timed out
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
at com.netflix.eureka.cluster.DynamicGZIPContentEncodingFilter.handle(DynamicGZIPContentEncodingFilter.java:48) ~[eureka-core-1.8.7.jar!/:1.8.7]
at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.8.7.jar!/:1.8.7]
at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:570) ~[jersey-client-1.19.1.jar!/:1.19.1]
at com.netflix.eureka.transport.JerseyReplicationClient.submitBatchUpdates(JerseyReplicationClient.java:116) ~[eureka-core-1.8.7.jar!/:1.8.7]
at com.netflix.eureka.cluster.ReplicationTaskProcessor.process(ReplicationTaskProcessor.java:80) ~[eureka-core-1.8.7.jar!/:1.8.7]
at com.netflix.eureka.util.batcher.TaskExecutors$BatchWorkerRunnable.run(TaskExecutors.java:187) [eureka-core-1.8.7.jar!/:1.8.7]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_181]
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method) ~[na:1.8.0_181]
at java.net.SocketInputStream.socketRead(Unknown Source) ~[na:1.8.0_181]
at java.net.SocketInputStream.read(Unknown Source) ~[na:1.8.0_181]
at java.net.SocketInputStream.read(Unknown Source) ~[na:1.8.0_181]
at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:161) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.java:82) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:278) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:286) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:257) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:230) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.9.jar!/:4.4.9]
at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:684) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:486) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.5.jar!/:4.5.5]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.5.jar!/:4.5.5]
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
... 10 common frames omitted
注意：所有服务都在UAT服务器中作为Windows服务运行（当前所有微服务都托管在同一服务器中）。
如果这里有人遇到类似的例外情况，请告诉我。