Unpacking <URL> to <TOOLPATH> on <SLAVE>
ERROR: Failed to download <URL> from slave; will retry from master
java.io.IOException: remote file operation failed: <TOOLPATH> at hudson.remoting.Channel@...:<SLAVE>: java.net.ConnectException: Connection timed out
	at hudson.FilePath.act(FilePath.java:976)
	at hudson.FilePath.act(FilePath.java:958)
	at hudson.FilePath.installIfNecessaryFrom(FilePath.java:797)
	at hudson.tools.ZipExtractionInstaller.performInstallation(ZipExtractionInstaller.java:79)
	at hudson.tools.InstallerTranslator.getToolHome(InstallerTranslator.java:68)
	at hudson.tools.ToolLocationNodeProperty.getToolHome(ToolLocationNodeProperty.java:107)
	at hudson.tools.ToolInstallation.translateFor(ToolInstallation.java:205)
	at hudson.model.JDK.forNode(JDK.java:130)
	at hudson.model.AbstractProject.getEnvironment(AbstractProject.java:350)
	at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1444)
	at hudson.model.AbstractProject._poll(AbstractProject.java:1421)
	at hudson.model.AbstractProject.poll(AbstractProject.java:1332)
	at jenkins.triggers.SCMTriggerItem$SCMTriggerItems$Bridge.poll(SCMTriggerItem.java:119)
	at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:515)
	at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:544)
	at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection timed out
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:579)
	at java.net.Socket.connect(Socket.java:528)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
	at sun.net.www.http.HttpClient.New(HttpClient.java:308)
	at sun.net.www.http.HttpClient.New(HttpClient.java:326)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:996)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:932)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:850)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1300)
	at java.net.URL.openStream(URL.java:1037)
	at hudson.FilePath$Unpack.invoke(FilePath.java:833)
	at hudson.FilePath$Unpack.invoke(FilePath.java:827)
	at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2577)
	at hudson.remoting.UserRequest.perform(UserRequest.java:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:324)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
	at ......remote call to <SLAVE>(Native Method)
	at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1356)
	at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
	at hudson.remoting.Channel.call(Channel.java:752)
	at hudson.FilePath.act(FilePath.java:969)
	... 20 more
FATAL: Failed to install <URL> to <TOOLPATH>
java.io.IOException: Failed to install <URL> to <TOOLPATH>
	at hudson.FilePath.installIfNecessaryFrom(FilePath.java:822)
	at hudson.tools.ZipExtractionInstaller.performInstallation(ZipExtractionInstaller.java:79)
	at hudson.tools.InstallerTranslator.getToolHome(InstallerTranslator.java:68)
	at hudson.tools.ToolLocationNodeProperty.getToolHome(ToolLocationNodeProperty.java:107)
	at hudson.tools.ToolInstallation.translateFor(ToolInstallation.java:205)
	at hudson.model.JDK.forNode(JDK.java:130)
	at hudson.model.AbstractProject.getEnvironment(AbstractProject.java:350)
	at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1444)
	at hudson.model.AbstractProject._poll(AbstractProject.java:1421)
	at hudson.model.AbstractProject.poll(AbstractProject.java:1332)
	at jenkins.triggers.SCMTriggerItem$SCMTriggerItems$Bridge.poll(SCMTriggerItem.java:119)
	at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:515)
	at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:544)
	at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Server returned HTTP response code: 504 for URL: <URL>
	at sun.reflect.GeneratedConstructorAccessor691.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1675)
	at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1673)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1671)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1244)
	at org.jvnet.robust_http_client.RetryableHttpStream.getStream(RetryableHttpStream.java:98)
	at org.jvnet.robust_http_client.RetryableHttpStream.<init>(RetryableHttpStream.java:91)
	at hudson.ProxyConfiguration.getInputStream(ProxyConfiguration.java:248)
	at hudson.FilePath.installIfNecessaryFrom(FilePath.java:808)
	... 18 more
Caused by: java.io.IOException: Server returned HTTP response code: 504 for URL: <URL>
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1626)
	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:2678)
	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:639)
	at java.net.URLConnection.getContentLengthLong(URLConnection.java:511)
	at java.net.URLConnection.getContentLength(URLConnection.java:495)
	at org.jvnet.robust_http_client.RetryableHttpStream.<init>(RetryableHttpStream.java:90)
	... 20 more