How can I get Maven to stop attempting to check for updates for artifacts from a certain group from maven-central-repo

Question

I m working on a fairly big Maven project   We have probably around 70 or so individual artifacts  which are roughly split into two libraries of shared code and maybe ten applications which use them   All of these items live in the namespace com mycompany     Most of the time we re running against snapshot builds   So to do a full build of an application  I might first build the library projects so that they are installed to my local repository  as  say  mycompany-libname-2 4-SNAPSHOT jar    The problem is that when I then go build the applications   For some reason  Maven wants to check the main two public repositories  maven-net-repo and java-net-repo  for updates for all of the mycompany- -SNAPSHOT jar artifacts   Of course  they aren t found there  and everything eventually resolves back to the versions I just built to my local repository  but I d like Maven to stop doing this because  a  it makes me feel like a bad net citizen for constantly checking these repositories for things that will never be there  and  b  it adds some unnecessary and annoying network latency into my build process   I ve taken to running maven in offline mode most of the time to work around this  but that s not ideal since occasionally a dependency on a public library will be updated   So what I m looking for is a solution which will cause Maven not to check for updates from given repositories for artifacts which meet certain criteria - in this case  I d be happy if Maven would ignore either SNAPSHOT versions or artifacts which were in the com mycompany namespace

User · Answer

Very simple    In your Super POM parent or setting xml  use           lt repository gt           lt id gt central lt  id gt           lt releases gt               lt updatePolicy gt never lt  updatePolicy gt           lt  releases gt           lt snapshots gt               lt updatePolicy gt never lt  updatePolicy gt           lt  snapshots gt           lt url gt http   repo1 maven org maven2 lt  url gt           lt layout gt legacy lt  layout gt       lt  repository gt    It s my tips

User · Answer

Also  you can use -o or --offline in the mvn command line which will put maven in  offline mode  so it won t check for updates  You ll get some warning about not being able to get dependencies not already in your local repo  but no big deal

User · Answer

Something that is now available in maven as well is  mvn goal --no-snapshot-updates   or in short  mvn goal -nsu

User · Answer

Update  I should have probably started with this as your projects are SNAPSHOTs  It is part of the SNAPSHOT semantics that Maven will check for updates on each build  Being a SNAPSHOT means that it is volatile and subject to change so updates should be checked for  However it s worth pointing out that the Maven super POM  configures central to have snapshots disabled  so Maven shouldn t ever check for updates for SNAPSHOTs on central unless you ve overridden that in your own pom settings     You can configure Maven to use a mirror for the central repository  this will redirect all requests that would normally go to central to your internal repository   In your settings xml you would add something like this to set your internal repository as as mirror for central    lt mirrors gt     lt mirror gt       lt id gt ibiblio org lt  id gt       lt name gt ibiblio Mirror of http   repo1 maven org maven2  lt  name gt       lt url gt http   path to my repository lt  url gt       lt mirrorOf gt central lt  mirrorOf gt     lt  mirror gt   lt  mirrors gt    If you are using a repository manager like Nexus for your internal repository  You can set up a proxy repository for proxy central  so any requests that would normally go to Central are instead sent to your proxy repository  or a repository group containing the proxy   and subsequent requests are cached in the internal repository manager  You can even set the proxy cache timeout to -1  so it will never request for contents from central that are already on the proxy repository     A more basic solution if you are only working with local repositories is to set the updatePolicy for the central repository to  never   this means Maven will only ever check for artifacts that aren t already in the local repository  This can then be overridden at the command line when needed by using the -U switch to force Maven to check for updates   You would configure the repository  in your pom or a profile in the settings xml  as follows    lt repository gt     lt id gt central lt  id gt     lt url gt http   repo1 maven org maven2 lt  url gt     lt updatePolicy gt never lt  updatePolicy gt   lt  repository gt

User · Answer

The updatePolicy tag didn t work for me  However Rich Seller mentioned that snapshots should be disabled anyways so I looked further and noticed that the extra repository that I added to my settings xml was causing the problem actually  Adding the snapshots section to this repository in my settings xml did the trick    lt repository gt       lt id gt jboss lt  id gt       lt name gt JBoss Repository lt  name gt       lt url gt http   repository jboss com maven2 lt  url gt       lt snapshots gt           lt enabled gt false lt  enabled gt       lt  snapshots gt   lt  repository gt

User · Answer

I had some trouble similar to this    lt repository gt       lt id gt java net lt  id gt       lt url gt https   maven-repository dev java net nonav repository lt  url gt       lt layout gt legacy lt  layout gt   lt  repository gt   lt repository gt       lt id gt java net2 lt  id gt       lt url gt https   maven2-repository dev java net nonav repository lt  url gt   lt  repository gt    Setting the updatePolicy to  never  did not work  Removing these repo was the way I solved it  ps  I was following this tutorial about web services  btw  probably the best tutorial for ws for java

[java] How can I get Maven to stop attempting to check for updates for artifacts from a certain group from maven-central-repo?

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