我正在使用maven-bundle-plugin：2.4.0将jetcd库转换为OSGi包。我得到了grpc-core的以下警告。你可以帮助我，因为我不熟悉Maven Build的复杂性。
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal: org.apache.felix:maven-bundle-plugin:2.4.0:install (default-install)
[DEBUG] Style: Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
<attachedArtifacts>${project.attachedArtifacts}</attachedArtifacts>
<localRepository>${localRepository}</localRepository>
<obrRepository>${obrRepository}</obrRepository>
<project>${project}</project>
</configuration>
[DEBUG] =======================================================================
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://15.250.145.102/artifactory/maven_virtual_1 as null
Downloading: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-core/1.5.0/grpc-core-1.5.0.pom
Downloaded: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-core/1.5.0/grpc-core-1.5.0.pom (3 KB at 2.9 KB/sec)
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-core/1.5.0/grpc-core-1.5.0.pom.lastUpdated
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-core/1.5.0/_maven.repositories
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://15.250.145.102/artifactory/maven_virtual_1 as null
Downloading: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-context/1.5.0/grpc-context-1.5.0.pom
Downloaded: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-context/1.5.0/grpc-context-1.5.0.pom (2 KB at 3.2 KB/sec)
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-context/1.5.0/grpc-context-1.5.0.pom.lastUpdated
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-context/1.5.0/_maven.repositories
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://15.250.145.102/artifactory/maven_virtual_1 as null
Downloading: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-context/1.2.0/grpc-context-1.2.0.pom
Downloaded: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-context/1.2.0/grpc-context-1.2.0.pom (2 KB at 3.2 KB/sec)
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-context/1.2.0/grpc-context-1.2.0.pom.lastUpdated
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-context/1.2.0/_maven.repositories
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://15.250.145.102/artifactory/maven_virtual_1 as null
Downloading: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-netty/1.5.0/grpc-netty-1.5.0.pom
Downloaded: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-netty/1.5.0/grpc-netty-1.5.0.pom (3 KB at 4.6 KB/sec)
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-netty/1.5.0/grpc-netty-1.5.0.pom.lastUpdated
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-netty/1.5.0/_maven.repositories
[DEBUG] Could not find metadata io.grpc:grpc-core/maven-metadata.xml in local (/share/raw/home/staff1/mukundac/.m2/repository)
[DEBUG] [DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://15.250.145.102/artifactory/maven_virtual_1 as null
Using connector WagonRepositoryConnector with priority 0 for http://15.250.145.102/artifactory/maven_virtual_1 as null
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://repo.typesafe.com/typesafe/releases/
Downloading: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-core/maven-metadata.xml
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://repository.springsource.com/maven/bundles/external
Downloading: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-core/maven-metadata.xml
Downloading: http://repo.typesafe.com/typesafe/releases/io/grpc/grpc-core/maven-metadata.xml
Downloading: http://repository.springsource.com/maven/bundles/external/io/grpc/grpc-core/maven-metadata.xml
Downloaded: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-core/maven-metadata.xml (2 KB at 0.9 KB/sec)
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-core/resolver-status.properties
Downloaded: http://15.250.145.102/artifactory/maven_virtual_1/io/grpc/grpc-core/maven-metadata.xml (2 KB at 0.9 KB/sec)
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-core/resolver-status.properties
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-core/resolver-status.properties
[DEBUG] Writing resolution tracking file /share/raw/home/staff1/mukundac/.m2/repository/io/grpc/grpc-core/resolver-status.properties
[WARNING] Could not transfer metadata io.grpc:grpc-core/maven-metadata.xml from/to typesafe (http://repo.typesafe.com/typesafe/releases/): Connection to http://repo.typesafe.com refused
org.sonatype.aether.transfer.MetadataTransferException: Could not transfer metadata io.grpc:grpc-core/maven-metadata.xml from/to typesafe (http://repo.typesafe.com/typesafe/releases/): Connection to http://repo.typesafe.com refused