Maven does not update snapshot dependency to latest version

["Walter B. Rasmann" <wa...@googlemail.com>]

Maven doesn't update snapshot dependencies to the latest version when run as:

mvn clean
mvn -U assemby:assembly

The "-with-dependencies" jar contains the old versions of the class
files and the local repository looks like this:

(~/.m2/repository/com/xxx/dependency1/dependency1/1.0-SNAPSHOT)

     dependency1-1.0-<TIMESTAMP>-1.jar
     dependency1-1.0-<TIMESTAMP>-2.jar
     dependency1-1.0-<TIMESTAMP>-3.jar
     dependency1-1.0-<TIMESTAMP>-4.jar
     dependency1-1.0-<TIMESTAMP>-5.jar
     dependency1-1.0-<TIMESTAMP>-6.jar
     dependency1-1.0-SNAPSHOT.jar

where "dependency1-1.0-SNAPSHOT.jar" is identical to
"dependency1-1.0-<TIMESTAMP>-1.jar". But
"dependency1-1.0-<TIMESTAMP>-6.jar" is the most recent package by
timestamp and package content.

The packages used as dependencies have been installed to a local
archiva repository using:

mvn deploy:deploy-file -DgroupId=com.xxx.dependecy1
-DartifactId=dependency1 -Dversion=1.0-SNAPSHOT -Dpackaging=jar
-Dfile=dependency1.jar -Durl=[url] -DrepositoryId=[id]

and are referenced in the "main" project pom as:

    <dependency>
      <groupId>com.xxx.dependency1</groupId>
      <artifactId>dependency1</artifactId>
      <version>1.0-SNAPSHOT</version>
    </dependency>

When run as

    mvn -U -X assembly:assembly

maven produces the following output:

[INFO] snapshot com.xxx.dependency1:dependency1:1.0-SNAPSHOT: checking
for updates from <archiva repository id>
[DEBUG] Checking for pre-existing User-Agent configuration.
[DEBUG] Adding User-Agent configuration.
[DEBUG] Connecting to repository: '<archiva repository id>' with url:
'<archiva repository url>'.
[INFO] snapshot com.xxx.dependency1:dependency1:1.0-SNAPSHOT: checking
for updates from repo1
[DEBUG] Checking for pre-existing User-Agent configuration.
[DEBUG] Adding User-Agent configuration.
[DEBUG] Connecting to repository: 'repo1' with url:
'http://repo1.maven.org/maven2/'.
[DEBUG] repository metadata for: 'snapshot
com.xxx.dependency1:dependency1:1.0-SNAPSHOT' could not be found on
repository: repo1
[INFO] snapshot com.xxx.dependency1:dependency1:1.0-SNAPSHOT: checking
for updates from maven2-repository.dev.java.net
[DEBUG] Checking for pre-existing User-Agent configuration.
[DEBUG] Adding User-Agent configuration.
[DEBUG] Connecting to repository: 'maven2-repository.dev.java.net'
with url: 'http://download.java.net/maven/2/'.
[DEBUG] repository metadata for: 'snapshot
com.xxx.dependency1:dependency1:1.0-SNAPSHOT' could not be found on
repository: maven2-repository.dev.java.net
[DEBUG] Skipping disabled repository central
[DEBUG] dependency1: resolved to version 1.0-<TIMESTAMP>-6 from
repository <archiva repository id>
[DEBUG]   com.xxx.dependency1:dependency1:jar:1.0-SNAPSHOT:compile
(selected for compile)

This actually suggests that it found the right version. But
"dependency1-1.0-<TIMESTAMP>-1.jar" gets included into the
"-with-dependencies" jar anyway.

After deleting

  ~/.m2/repository/com/xxx/dependency1/dependency1/1.0-SNAPSHOT/dependency1-1.0-SNAPSHOT.jar

manually and reruning "mvn -U assembly:assembly"
"dependency1-1.0-SNAPSHOT.jar" is a copy of
"dependency1-1.0-<TIMESTAMP>-6.jar" and the "-with-dependencies" jar
includes the right files.

Is this some kind of bug?

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