执行nexus私库地址，并且npm login完成后，进行npm i下载依赖时，当依赖过多或者执行时间过长时，出现如下错误提示
npm ERR! path D:\xxx\xxx\xxx\node_modules\.staging\echarts-7d8faaa3\dist\echarts.simple.js npm ERR! code EPERM npm ERR! errno -4048 npm ERR! syscall lstat npm ERR! Error: EPERM: operation not permitted, lstat 'D:\xxx\xxx\xxx\node_modules\.staging\echarts-7d8faaa3\dist\echarts.simple.js' npm ERR! { [Error: EPERM: operation not permitted, lstat 'D:\xxx\xxx\xxx\node_modules\.staging\echarts-7d8faaa3\dist\echarts.simple.js'] npm ERR! cause: npm ERR! { Error: EPERM: operation not permitted, lstat 'D:\xxx\xxx\xxx\node_modules\.staging\echarts-7d8faaa3\dist\echarts.simple.js' npm ERR! errno: -4048, npm ERR! code: 'EPERM', npm ERR! syscall: 'lstat', npm ERR! path: npm ERR! 'D:\xxx\xxx\xxx\\node_modules\\.staging\\echarts-7d8faaa3\\dist\\echarts.simple.js' }, npm ERR! stack: npm ERR! 'Error: EPERM: operation not permitted, lstat \'D:\xxx\xxx\xxx\\node_modules\\.staging\\echarts-7d8faaa3\\dist\\echarts.simple.js\'', npm ERR! errno: -4048, npm ERR! code: 'EPERM', npm ERR! syscall: 'lstat', npm ERR! path: npm ERR! 'D:\xxx\xxx\xxx\\node_modules\\.staging\\echarts-7d8faaa3\\dist\\echarts.simple.js', npm ERR! parent: 'hj-admin-ui' } npm ERR! npm ERR! The operation was rejected by your operating system. npm ERR! It's possible that the file was already in use (by a text editor or antivirus), npm ERR! or that you lack permissions to access it. npm ERR! npm ERR! If you believe this might be a permissions issue, please double-check the npm ERR! permissions of the file and its containing directories, or try running npm ERR! the command again as root/Administrator (though this is not recommended). npm ERR! A complete log of this run can be found in: npm ERR! F:\nodejs\node_cache\_logs\2021-06-11T04_06_28_812Z-debug.log
开始认为是echarts版本问题，更新版本后仍然无法解决。
（此问题困扰了我2天。。。网上相关问题都搜遍了。什么使用管理员权限执行。。清除缓存都试过了，果然出问题还是靠自己）
查看nexus服务日志发现，当依赖下载报错时，出现如下错误提示
2021-06-11 12:04:36,196+0800 WARN [qtp216950519-295] admin org.sonatype.nexus.repository.httpbridge.internal.ViewServlet - Failure servicing: GET /repository/npm-public/echarts/-/echarts-4.9.0.tgz java.io.IOException: java.util.concurrent.TimeoutException: Idle timeout expired: 30001/30000 ms at org.eclipse.jetty.util.SharedBlockingCallback$Blocker.block(SharedBlockingCallback.java:257) at org.eclipse.jetty.server.HttpOutput.channelWrite(HttpOutput.java:270) at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:868) at com.google.common.io.ByteStreams.copy(ByteStreams.java:112) at org.sonatype.nexus.repository.view.Payload.copy(Payload.java:61) at org.sonatype.nexus.repository.view.Content.copy(Content.java:116) at org.sonatype.nexus.repository.httpbridge.internal.DefaultHttpResponseSender.send(DefaultHttpResponseSender.java:79) at org.sonatype.nexus.repository.httpbridge.internal.ViewServlet.dispatchAndSend(ViewServlet.java:229) at org.sonatype.nexus.repository.httpbridge.internal.ViewServlet.doService(ViewServlet.java:175) at org.sonatype.nexus.repository.httpbridge.internal.ViewServlet.service(ViewServlet.java:127) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:290) at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:280) at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:184) at com.google.inject.servlet.DynamicServletPipeline.service(DynamicServletPipeline.java:71) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:85) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:112) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:450) at org.sonatype.nexus.security.SecurityFilter.executeChain(SecurityFilter.java:96) at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387) at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) at org.sonatype.nexus.security.SecurityFilter.doFilterInternal(SecurityFilter.java:112) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at org.sonatype.nexus.repository.httpbridge.internal.ExhaustRequestFilter.doFilter(ExhaustRequestFilter.java:80) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.sonatype.nexus.licensing.internal.LicensingRedirectFilter.doFilter(LicensingRedirectFilter.java:116) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.codahale.metrics.servlet.AbstractInstrumentedFilter.doFilter(AbstractInstrumentedFilter.java:112) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at org.sonatype.nexus.internal.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:79) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at org.sonatype.nexus.internal.web.EnvironmentFilter.doFilter(EnvironmentFilter.java:101) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at org.sonatype.nexus.internal.web.HeaderPatternFilter.doFilter(HeaderPatternFilter.java:98) at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82) at com.google.inject.servlet.DynamicFilterPipeline.dispatch(DynamicFilterPipeline.java:104) at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133) at org.sonatype.nexus.bootstrap.osgi.DelegatingFilter.doFilter(DelegatingFilter.java:73) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:201) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1435) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1350) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:239) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.Server.handle(Server.java:516) at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105) at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:383) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:882) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1036) at java.lang.Thread.run(Thread.java:748) Caused by: java.util.concurrent.TimeoutException: Idle timeout expired: 30001/30000 ms at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:171) at org.eclipse.jetty.io.IdleTimeout.idleCheck(IdleTimeout.java:113) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ... 1 common frames omitted
重点是 java.io.IOException: java.util.concurrent.TimeoutException: Idle timeout expired: 30001/30000 ms，
由此可知，错误原因是网络连接超时。分析应该是因为第三方依赖过多，导致下载依赖的时间超过了http请求的默认等待时间30000ms导致下载请求被掐断了。
知道原因就好解决了。
通过错误提示发现nexus是采用了 jetty，所以进入nexus根目录\etc\jetty，找到jetty-http.xml和jetty-https.xml
打开xml搜索Set name="idleTimeout"
将后面的default=30000改成1200000
重启服务（一定要重启服务）
再次执行npm i指令。
下载正常，问题解决。
