请教2个导致测试无法完成的报错原因

[Andma]

搭建完环境后基本卡在了这两个问题上，导致测试无法完成，请问问题可能出在哪里，给一些思路也可以
1、启动测试后就连接建立超时，并结束测试任务
但是在监控器--代理列表，代理是在线的，也已经确认过代理、监控器、被测服务之间是可以正常通信的
2019-08-01 10:08:52,738 INFO before thread. init headers and cookies
2019-08-01 10:08:53,563 INFO thread-2 is invoked after 3500 ms sleep
2019-08-01 10:08:53,564 INFO before thread. init headers and cookies
2019-08-01 10:08:53,587 ERROR Connection establishment timed out
net.grinder.plugin.http.TimeoutException: Connection establishment timed out
at HTTPClient.HTTPConnection.getSocket(HTTPConnection.java:3448) ~[grinder-httpclient-3.9.1.jar:na]
at HTTPClient.HTTPConnection.sendRequest(HTTPConnection.java:3089) ~[grinder-httpclient-
3.9.1.jar:na]
at HTTPClient.HTTPConnection.handleRequest(HTTPConnection.java:2883) ~[grinder-httpclient-
3.9.1.jar:na]
at HTTPClient.HTTPConnection.setupRequest(HTTPConnection.java:2675) ~[grinder-httpclient-
3.9.1.jar:na]
at HTTPClient.HTTPConnection.Get(HTTPConnection.java:986) ~[grinder-httpclient-3.9.1.jar:na]
at net.grinder.plugin.http.HTTPRequest$2.doRequest(HTTPRequest.java:504) ~[grinder-http-
3.9.1.jar:na]
at net.grinder.plugin.http.HTTPRequest$AbstractRequest.getHTTPResponse(HTTPRequest.java:1276) ~
[grinder-http-3.9.1.jar:na]
at net.grinder.plugin.http.HTTPRequest.GET(HTTPRequest.java:499) ~[grinder-http-3.9.1.jar:na]
at net.grinder.plugin.http.HTTPRequest.GET(HTTPRequest.java:474) ~[grinder-http-3.9.1.jar:na]
at net.grinder.plugin.http.HTTPRequest$GET$0.call(Unknown Source) ~[na:na]
at TestRunner.test(demo2-3.groovy:71) ~[na:na]
at net.grinder.scriptengine.groovy.junit.GrinderRunner.run(GrinderRunner.java:170) ~[ngrinder-groovy-
3.4.3.jar:na]
at
net.grinder.scriptengine.groovy.GroovyScriptEngine$GroovyWorkerRunnable.run(GroovyScriptEngine.java:147)
~[ngrinder-groovy-3.4.3.jar:na]
at net.grinder.engine.process.GrinderThread.run(GrinderThread.java:118) ~[grinder-core-3.9.1.jar:na]
2、如若能正常启动，在2分钟之后，会出现如下错误，导致结束测试，这个报错一点思路都没有。。
2019-07-30 14:45:10,107 INFO  before thread. init headers and cookies
2019-07-30 14:45:10,142 ERROR Premature EOF encountered
HTTPClient.RetryException: Premature EOF encountered
        at HTTPClient.StreamDemultiplexor.retry_requests(StreamDemultiplexor.java:530) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.StreamDemultiplexor.close(StreamDemultiplexor.java:498) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.StreamDemultiplexor.read(StreamDemultiplexor.java:369) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.RespInputStream.read(RespInputStream.java:155) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.RespInputStream.read(RespInputStream.java:115) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.Response.readResponseHeaders(Response.java:980) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.Response.getHeaders(Response.java:698) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.Response.getVersion(Response.java:290) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.HTTPConnection.sendRequest(HTTPConnection.java:3239) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.HTTPConnection.handleRequest(HTTPConnection.java:2883) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.HTTPConnection.setupRequest(HTTPConnection.java:2675) ~[grinder-httpclient-3.9.1.jar:na]
        at HTTPClient.HTTPConnection.Get(HTTPConnection.java:986) ~[grinder-httpclient-3.9.1.jar:na]
        at net.grinder.plugin.http.HTTPRequest$2.doRequest(HTTPRequest.java:504) ~[grinder-http-3.9.1.jar:na]
        at net.grinder.plugin.http.HTTPRequest$AbstractRequest.getHTTPResponse(HTTPRequest.java:1276) ~[grinder-http-3.9.1.jar:na]
        at net.grinder.plugin.http.HTTPRequest.GET(HTTPRequest.java:499) ~[grinder-http-3.9.1.jar:na]
        at net.grinder.plugin.http.HTTPRequest.GET(HTTPRequest.java:474) ~[grinder-http-3.9.1.jar:na]
        at net.grinder.plugin.http.HTTPRequest$GET$0.call(Unknown Source) ~[na:na]
        at TestRunner.test(demo2-3.groovy:71) ~[na:na]
        at net.grinder.scriptengine.groovy.junit.GrinderRunner.run(GrinderRunner.java:170) ~[ngrinder-groovy-3.4.3.jar:na]
        at net.grinder.scriptengine.groovy.GroovyScriptEngine$GroovyWorkerRunnable.run(GroovyScriptEngine.java:147) ~[ngrinder-groovy-3.4.3.jar:na]
        at net.grinder.engine.process.GrinderThread.run(GrinderThread.java:118) ~[grinder-core-3.9.1.jar:na]