Maven Central dependency resolution constantly fails with "connect timed out"

Hello,

We’ve had problems over the last few days with Maven dependencies failing to be retrieved from Maven Central due to connection timeouts.

My build is now failing 100% of the time with this same “connect timed out” error from the Maven Central repo. Other builds are failing with the same issue.

Could this is related to rate-limiting from Maven Central?

An example of a failing (private) build is this here: https://travis-ci.com/Swirrl/muttnik/builds/121991654

I have tried extending the timeout in my own settings.xml, but I have no idea if this is having any effect on the Travis Maven behaviour - it doesn’t seem to.

Can the timeout be extended, and if so what is the recommended approach?

Example stacktrace:

Error building classpath. Failed to read artifact descriptor for com.google.inject:guice:jar:no_aop:4.0
org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for com.google.inject:guice:jar:no_aop:4.0
	at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:323)
	at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:192)
	at org.eclipse.aether.internal.impl.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:253)
	at clojure.tools.deps.alpha.extensions.maven$eval709$fn__711.invoke(maven.clj:96)
	at clojure.lang.MultiFn.invoke(MultiFn.java:244)
	at clojure.tools.deps.alpha$expand_deps$fn__1083.invoke(alpha.clj:192)
	at clojure.tools.deps.alpha$expand_deps.invokeStatic(alpha.clj:191)
	at clojure.tools.deps.alpha$expand_deps.invoke(alpha.clj:172)
	at clojure.tools.deps.alpha$resolve_deps.invokeStatic(alpha.clj:239)
	at clojure.tools.deps.alpha$resolve_deps.invoke(alpha.clj:221)
	at clojure.tools.deps.alpha.script.make_classpath$create_classpath.invokeStatic(make_classpath.clj:59)
	at clojure.tools.deps.alpha.script.make_classpath$create_classpath.invoke(make_classpath.clj:52)
	at clojure.tools.deps.alpha.script.make_classpath$run.invokeStatic(make_classpath.clj:70)
	at clojure.tools.deps.alpha.script.make_classpath$run.invoke(make_classpath.clj:64)
	at clojure.tools.deps.alpha.script.make_classpath$_main.invokeStatic(make_classpath.clj:109)
	at clojure.tools.deps.alpha.script.make_classpath$_main.doInvoke(make_classpath.clj:84)
	at clojure.lang.RestFn.applyTo(RestFn.java:137)
	at clojure.lang.Var.applyTo(Var.java:705)
	at clojure.core$apply.invokeStatic(core.clj:665)
	at clojure.main$main_opt.invokeStatic(main.clj:491)
	at clojure.main$main_opt.invoke(main.clj:487)
	at clojure.main$main.invokeStatic(main.clj:598)
	at clojure.main$main.doInvoke(main.clj:561)
	at clojure.lang.RestFn.applyTo(RestFn.java:137)
	at clojure.lang.Var.applyTo(Var.java:705)
	at clojure.main.main(main.java:37)
Caused by: org.apache.maven.model.resolution.UnresolvableModelException: Could not transfer artifact com.google:google:pom:5 from/to central (https://repo1.maven.org/maven2/): connect timed out
	at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:178)
	at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:224)
	at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:1051)
	at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:829)
	at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:331)
	at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:314)
	... 25 more
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not transfer artifact com.google:google:pom:5 from/to central (https://repo1.maven.org/maven2/): connect timed out
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:422)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:224)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:201)
	at org.apache.maven.repository.internal.DefaultModelResolver.resolveModel(DefaultModelResolver.java:174)
	... 30 more
Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact com.google:google:pom:5 from/to central (https://repo1.maven.org/maven2/): connect timed out
	at org.eclipse.aether.connector.basic.ArtifactTransportListener.transferFailed(ArtifactTransportListener.java:52)
	at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:365)
	at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:75)
	at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:583)
	at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:259)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:498)
	at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:399)
	... 33 more
Caused by: java.net.SocketTimeoutException: connect timed out
	at java.net.PlainSocketImpl.socketConnect(Native Method)

Thank you

We also have similar problems but with pulling images from docker. I think it is Travis-wide issue

Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

746+rm -rf -- /home/travis/build/apache/airflow/.build/cache/UVy7yccSkc

+1 samsies

Could be related to this issue: Travis Network Timeout Issue

This issue seems to have been fixed by the recent NAT gateway reversions, applied by Travis staff.

It’s working for me now

We are sorry for the troubles you have experienced last week.

We needed to have new IP addresses safelisted over at Maven Central. They were safelisted last Friday in the end. I’ll close this issue for now but please open a new one if it happens again.

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