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With maven, I occasionally hit an artifact that comes from some 3rd-party repo that I haven't built or included in my repository yet.
I'll get an error message from the maven client saying that an artifact can't be found:
Failure to find org.jfrog.maven.annomojo:maven-plugin-anno:jar:1.4.0
in
http://myrepo:80/artifactory/repo
was cached in the local
repository, resolution will not be reattempted until the update
interval of MyRepo has elapsed or updates are forced -> [Help 1]
Now,
I
understand what this means,
and can simply re-run my command with
-U
, and things usually work fine from there on out
.
However, I find this error message to be extremely unintuitive and am trying to spare my co-workers some headaches.
I am trying to figure out if there is some place that I can modify this
update interval
setting.
Is the
update interval
that is mentioned in this error message a client-side or server-side setting?
If client-side, how do I configure it?
If server-side, does anyone know how/if Nexus/Artifactory expose these settings?
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I used to solve this issue by deleting the corresponding failed to download artifact directory in my local repo. Next time I run the maven command the artifact download is triggered again. Therefore I'd say it's a client side setting.
Nexus side (server repo side), this issue is solved configuring a scheduled task.
Client side, this is done using
-U
, as you already pointed out.
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What basically happens is, according to the default updatePolicy of maven, maven will fetch the jars from the repo on a daily basis. So if during the first attempt your Internet was not working, then it would not try to fetch this jar again until 24hours has passed.
Resolution:
Either use
mvn -U clean install
(where -U will force update the repo)
or use
<profiles>
<profile>
<repositories>
<repository>
<id>myRepo</id>
<name>My Repository</name>
<releases>
<enabled>false</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</releases>
</repository>
</repositories>
</profile>
</profiles>
in your settings.xml
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I had a related problem, but Raghuram's answer helped. (I don't have enough reputation yet to vote his answer up). I'm using Maven bundled with NetBeans, and was getting the same "...was cached in the local repository, resolution will not be reattempted until the update interval of nexus has elapsed or updates are forced -> [Help 1]" error.
To fix this I added <updatePolicy>always</updatePolicy> to my settings file (C:\Program Files\NetBeans 7.0\java\maven\conf\settings.xml)
<profile>
<id>nexus</id>
<!--Enable snapshots for the built in central repo to direct -->
<!--all requests to nexus via the mirror -->
<repositories>
<repository>
<id>central</id>
<url>http://central</url>
<releases><enabled>true</enabled><updatePolicy>always</updatePolicy></releases>
<snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>central</id>
<url>http://central</url>
<releases><enabled>true</enabled><updatePolicy>always</updatePolicy></releases>
<snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots>
</pluginRepository>
</pluginRepositories>
</profile>
While you can resolve this with a clean install (overriding any cached dependencies) as @Sanjeev-Gulgani suggests with mvn -U clean install
You can also simply remove the cached dependency that is causing the problem with
mvn dependency:purge-local-repository -DmanualInclude="groupId:artifactId"
See mvn docs for more info.
–
updatePolicy: This element specifies how often updates should attempt to occur. Maven will compare the local POM’s timestamp (stored
in a repository’s maven-metadata file) to the remote. The choices are:
always, daily (default), interval:X (where X is an integer in minutes)
or never.
Example:
<profiles>
<profile>
<repositories>
<repository>
<id>myRepo</id>
<name>My Repository</name>
<releases>
<enabled>false</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</releases>
</repository>
</repositories>
</profile>
</profiles>
</settings>
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Is there an actual JAR for the dependency in the repo? Your error message contains a URL of where it is searching, so go there, and then browse to the folder that matches your dependency. Is there a jar? If not, you need to change your dependency. (for example, you could be pointing at a top level parent dependency, when you should be pointing at a sub project)
If the jar exists on the remote repo, then just delete your local copy. It will be in your home directory (unless you configured differently) under .m2/repository (ls -a to show hidden if on Linux).
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If you are using Eclipse then go to Windows -> Preferences -> Maven and uncheck the "Do not automatically update dependencies from remote repositories" checkbox.
This works with Maven 3 as well.
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<...> was cached in the local repository, resolution will not be reattempted
until the update interval of central has elapsed or updates are forced
None of the above described solutions worked for me. I finally resolved this in IntelliJ IDEA by
File > Invalidate Caches / Restart ... > Invalidate and Restart.
If you use Nexus as a proxy repo, it has "Not Found Cache TTL" setting with default value 1440 minutes (or 24 hours). Lowering this value may help (Repositories > Configuration > Expiration Settings).
See documentation for more info.
To finally answer the title question: It is (a client side setting) in (project, profile or settings)
[plugin]?[r|R]epository/[releases|snapshots]/updatePolicy
... tag.
The (currently, maven: 3.6.0, but I suppose "far backwards" compatible) possible values are :
* Never update locally cached data.
public static final String UPDATE_POLICY_NEVER = "never";
* Always update locally cached data.
public static final String UPDATE_POLICY_ALWAYS = "always";
* Update locally cached data once a day.
public static final String UPDATE_POLICY_DAILY = "daily";
* Update locally cached data **every X minutes** as given by "interval:X".
public static final String UPDATE_POLICY_INTERVAL = "interval";
The current (maven 3.6.0) evaluation of this tag is implemented as follows:
public boolean isUpdatedRequired( RepositorySystemSession session, long lastModified, String policy )
boolean checkForUpdates;
if ( policy == null )
policy = "";
if ( RepositoryPolicy.UPDATE_POLICY_ALWAYS.equals( policy ) )
checkForUpdates = true;
else if ( RepositoryPolicy.UPDATE_POLICY_DAILY.equals( policy ) )
Calendar cal = Calendar.getInstance();
cal.set( Calendar.HOUR_OF_DAY, 0 );
cal.set( Calendar.MINUTE, 0 );
cal.set( Calendar.SECOND, 0 );
cal.set( Calendar.MILLISECOND, 0 );
checkForUpdates = cal.getTimeInMillis() > lastModified;
else if ( policy.startsWith( RepositoryPolicy.UPDATE_POLICY_INTERVAL ) )
int minutes = getMinutes( policy );
Calendar cal = Calendar.getInstance();
cal.add( Calendar.MINUTE, -minutes );
checkForUpdates = cal.getTimeInMillis() > lastModified;
// assume "never"
checkForUpdates = false;
if ( !RepositoryPolicy.UPDATE_POLICY_NEVER.equals( policy ) )
LOGGER.warn( "Unknown repository update policy '{}', assuming '{}'",
policy, RepositoryPolicy.UPDATE_POLICY_NEVER );
return checkForUpdates;
..with:
private int getMinutes( String policy )
int minutes;
String s = policy.substring( RepositoryPolicy.UPDATE_POLICY_INTERVAL.length() + 1 );
minutes = Integer.valueOf( s );
catch ( RuntimeException e )
minutes = 24 * 60;
LOGGER.warn( "Non-parseable repository update policy '{}', assuming '{}:1440'",
policy, RepositoryPolicy.UPDATE_POLICY_INTERVAL );
return minutes;
...where lastModified is the (local file) "modified timestamp" of an/each underlying artifact.
In particular for the interval:x setting:
the colon : is not that strict - any "non-empty" character could do it (=, , ...).
negative values x < 0 should yield to "never".
interval:0 I would assume a "minutely" (0-59 secs. or above...) interval.
number format exceptions result in 24 * 60 minutes (~"daily").
..see: DefaultUpdatePolicyAnalyzer, DefaultMetadataResolver#resolveMetadata() and RepositoryPolicy
Maven has updatePolicy settings for specifying the frequency to check the updates in the repository or to keep the repository in sync with remote.
The default value for updatePolicy is daily.
Other values can be always / never/ XX (specifying interval in minutes).
Below code sample can be added to maven user settings file to configure updatePolicy.
<pluginRepositories>
<pluginRepository>
<id>Releases</id>
<url>http://<host>:<port>/nexus/content/repositories/releases/</url>
<releases>
<enabled>true</enabled>
<updatePolicy>daily</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
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How I got this problem,
When I changed from Eclipse Juno to Luna, and checkout my maven projects from SVN repo, I got the same issues while building the applications.
What I tried?
I tried clean Local repository and then updating all the versions again using -U option. But my problem continued.
Then I went to Window --> Preferences -> Maven --> User Settings --> and clicked on Reindex button under Local Repository and wait for the reindex to happen.
That's all, the issue is resolved.
"[ERROR] Failed to execute goal on project testproject: Could not resolve dependencies for project myjarname:jar:1.0-0: Failure to find myjarname-core:bundle:1.0-0 in http://repo1.maven.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1]"
This error was caused by accidentally using Maven 3 instead of Maven 2. Just figured it might save someone some time, because my initial google search led me to this page.
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I had the same error, (resolution will not be reattempted...) but I had different requirements, as I have files in my local repository, that are currently not available remotely (old outdated libraries and internal libraries), and my company nexus system is down, but they do exist in my .m2 repos.
Maven still refused to build, producing the same error above.
For the offending libraries, I just removed the corresponding file:
_remote.repositories
exmple path: users\[username]\.m2\[offending jar
path]\[versionnumber]\_remote.respositories
knowing that these files are only available locally.
Note: Long term resolution, I should probably get our previous nexus system up and running, and for those jars that are legacy, check them into the project under a lib folder (or something like that)
I have resolved it!
I have encountered this issue earlier and after reviewing some comments it worked.
we only have to correct settings.xml file under {m2_home}/.m2
**<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>.m2/repository</localRepository>
<profiles>
<profile>
<repositories>
<repository>
<id>projectid</id>
<url>http://localhost</url>
<name>Project name</name>
<releases>
<enabled>false</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</releases>
</repository>
</repositories>
</profile>
</profiles>
</settings>**
and execute maven clean install command.
**/maven_home/mvn -f project_directory/pom.xml -DskipTests clean install**
I had this problem and the comprehensive descriptions proposed in this helped me to fix it.
The second declared problem was my issue. I used a third-party repository which I had just added it do the repository part of the pom file in my project. I add the same repository information into pluginrepository to resolve this problem.
I ran into the same problems with uploaded third party libraries on my private repository. Sometimes the described fixes worked for me, but sometimes they did not.
I think the root cause of the problem is a missing pom.xml file for the artifact. (The pom.xml for the third party artifact not your pom.xml in your project). I assume Maven expects for every artifact a pom.xml, so it can resolve the dependencies for all artifacts. Sometimes it works without a pom.xml, but sometimes it does not (I have not identified, when it does not).
I use Nexus3 as a private repository. When you upload an artifact, you can check an option to generate a pom.xml file for the artifact.
Go to your Pom file and right-click and scroll down then click on maven to open the settings.xml file (as you see from the image) and add the following code (to your settings.xml file) then save and close and wait for maven to reload.
<mirrors>
<mirror>
<id>my-mirror</id>
<url>https://repo.maven.apache.org/maven2/</url>
<mirrorOf>central</mirrorOf>
</mirror>
</mirrors>
Then refresh/reload your pom file/project.
N:B You may have to go to your main spring boot class and Hoover on top of @SprinBootApplication then click on the suggestion to add Maven dependency ......
This will reinstall your local maven dependencies which you are likely to have lost.
I have tried the following solutions but none worked for me (with eclipse-embedded maven):
deleting files from the repository folder
adding a mirror in settings.xml
adding a profile with updatePolicy=always in settings.xml
I've seen many of these solution with lot of upvotes, but they are pretty old, so I guess they worked once, but nowdays are no longer valid (at least for eclipse-embedded maven).
What worked for me:
in Eclipse go to Window > Preferences > Maven and set the "Global Update Policy" field to "Always".
Make sure that the artifact you are looking for is exist , if its on your local project run :
cd ..
cd project name
mvn clean install
Then you will have it locally.
for better practice do :
mvn clean deploy so you can use it again without this problem
