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Robert Metzger commented on FLINK-16947: ---------------------------------------- That is indeed a very good observation. The Alibaba machines are probably running in a somewhat unstable network environment. I suspect the rate-limiting of the network (the machines are capped at 100MBit/s) to cause this. When I download stuff, the variability of download rates is crazy (sometimes wget reports 150 kb/s for a few minutes, then it jumps to 11 MB/s and finishes in a few seconds). Other indications for network issues: - the downloading of the maven cache (probably also because of a library that is not able to deal with the broken network) FLINK-16411 - the conda download in the python tests (FLINK-17188) - maven 3.2.5 having issues downloading from google / apache maven central mirrors. I'm wondering whether we should build our own maven version with a newer http client version (if we want to get rid of this problem as well) > ArtifactResolutionException: Could not transfer artifact. Entry [...] has > not been leased from this pool > --------------------------------------------------------------------------------------------------------- > > Key: FLINK-16947 > URL: https://issues.apache.org/jira/browse/FLINK-16947 > Project: Flink > Issue Type: Bug > Components: Build System / Azure Pipelines > Reporter: Piotr Nowojski > Assignee: Robert Metzger > Priority: Critical > Labels: test-stability > Fix For: 1.11.0 > > > https://dev.azure.com/rmetzger/Flink/_build/results?buildId=6982&view=logs&j=c88eea3b-64a0-564d-0031-9fdcd7b8abee&t=1e2bbe5b-4657-50be-1f07-d84bfce5b1f5 > Build of flink-metrics-availability-test failed with: > {noformat} > [ERROR] Failed to execute goal > org.apache.maven.plugins:maven-surefire-plugin:2.22.1:test (end-to-end-tests) > on project flink-metrics-availability-test: Unable to generate classpath: > org.apache.maven.artifact.resolver.ArtifactResolutionException: Could not > transfer artifact org.apache.maven.surefire:surefire-grouper:jar:2.22.1 > from/to google-maven-central > (https://maven-central-eu.storage-download.googleapis.com/maven2/): Entry > [id:13][route:{s}->https://maven-central-eu.storage-download.googleapis.com:443][state:null] > has not been leased from this pool > [ERROR] org.apache.maven.surefire:surefire-grouper:jar:2.22.1 > [ERROR] > [ERROR] from the specified remote repositories: > [ERROR] google-maven-central > (https://maven-central-eu.storage-download.googleapis.com/maven2/, > releases=true, snapshots=false), > [ERROR] apache.snapshots (https://repository.apache.org/snapshots, > releases=false, snapshots=true) > [ERROR] Path to dependency: > [ERROR] 1) dummy:dummy:jar:1.0 > [ERROR] 2) org.apache.maven.surefire:surefire-junit47:jar:2.22.1 > [ERROR] 3) org.apache.maven.surefire:common-junit48:jar:2.22.1 > [ERROR] 4) org.apache.maven.surefire:surefire-grouper:jar:2.22.1 > [ERROR] -> [Help 1] > [ERROR] > [ERROR] To see the full stack trace of the errors, re-run Maven with the -e > switch. > [ERROR] Re-run Maven using the -X switch to enable full debug logging. > [ERROR] > [ERROR] For more information about the errors and possible solutions, please > read the following articles: > [ERROR] [Help 1] > http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException > [ERROR] > [ERROR] After correcting the problems, you can resume the build with the > command > [ERROR] mvn <goals> -rf :flink-metrics-availability-test > {noformat} -- This message was sent by Atlassian Jira (v8.3.4#803005)