本地搭建的nexus代理不能获取中央仓库的构件了

Question

使用的官方发布的nexus-2.11.2-03，下载war版本运行在centos6.5系统上tomcat中，之前很长一段时间内都是好好的，但是今天在使用的时候发现不能获取中央仓库中的构件和索引了。

重启tomcat，在日志中看到nexus在启动后打出了错误信息：

2015-07-07 09:34:53,583+0800 WARN  [pxpool-1-thread-4] *TASK com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask - Scheduled task (Health Check: ibiblio) failed :: Health Check Management for Repository ibiblio (started 2015-07-07T09:34:33+08:00, runtime 0:00:20.213)
java.net.UnknownHostException: rhc.sonatype.com: unknown error
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_40]
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907) ~[na:1.8.0_40]
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302) ~[na:1.8.0_40]
        at java.net.InetAddress.getAllByName0(InetAddress.java:1255) ~[na:1.8.0_40]
        at java.net.InetAddress.getAllByName(InetAddress.java:1171) ~[na:1.8.0_40]
        at java.net.InetAddress.getAllByName(InetAddress.java:1105) ~[na:1.8.0_40]
        at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:44) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:102) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:319) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106) ~[httpclient-4.3.6.jar:4.3.6]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57) ~[httpclient-4.3.6.jar:4.3.6]
        at com.sonatype.nexus.plugins.healthcheck.service.impl.InsightServiceImpl.execute(InsightServiceImpl.java:250) ~[na:na]
        at com.sonatype.nexus.plugins.healthcheck.service.impl.InsightServiceImpl.doGet(InsightServiceImpl.java:204) ~[na:na]
        at com.sonatype.nexus.plugins.healthcheck.service.impl.InsightServiceImpl.getNextRunDeltas(InsightServiceImpl.java:81) ~[na:na]
        at com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask.doDeltaCheck(HealthCheckTask.java:372) ~[na:na]
        at com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask.doRunSafe(HealthCheckTask.java:171) ~[na:na]
        at com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask.doRun(HealthCheckTask.java:129) ~[na:na]
        at org.sonatype.nexus.scheduling.AbstractNexusTask.call(AbstractNexusTask.java:151) ~[nexus-core-2.11.2-03.jar:2.11.2-03]
        at org.sonatype.scheduling.DefaultScheduledTask.call(DefaultScheduledTask.java:418) [nexus-scheduler-2.11.2-03.jar:2.11.2-03]
        at org.sonatype.nexus.threads.MDCAwareCallable.call(MDCAwareCallable.java:44) [nexus-core-2.11.2-03.jar:2.11.2-03]
        at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.2.3.jar:1.2.3]
        at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.2.3.jar:1.2.3]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_40]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_40]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_40]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_40]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_40]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_40]

并且在web页面上，中央仓库的状态也还是不可用的

大家帮帮忙看看是怎么回事啊

Answer 1

osc的是因为没有带宽吧

Answer 2

http://maven.oschina.net/是不是因为它暂停使用的原因？

Answer 3

原因已经找到，问题也已经解决，是DNS解析的问题，换了一个DNS服务器之后就好了