maven- not downloading new added dependency in pom.xml file

Question

I need new third party jar for reading csv in maven based project. So, I did entry in pom.xml for same as below.

<dependency>
        <groupId>net.sf.opencsv</groupId>
        <artifactId>opencsv</artifactId>
        <version>2.0</version>
    </dependency>

But when I run mvn install or mvn package command, It does not download newly added dependency and just build project and generate war.

I am trying to get the issue! Please share solution if anybody face this earlier!

Regards

Are you running from terminal or from an ide? perhaps try `maven clean install` — Hagai, Oct 22 '14 at 11:33
does the dependency (or a previous version of it) appear in your local .m2 repository? — Hagai, Oct 22 '14 at 11:39
@Hagai yes, it is! that jar same version was downloaded for other projects but, i was needed to that in my project class path in mavens way! Now I resolved issue and also posted here what I tried! — S Singh, Oct 22 '14 at 11:59

score 25 · Answer 1 · answered Oct 22 '14 at 11:34

25

Try running a forced update:

mvn clean install -U

The -U (uppercase U) forces maven to look at all dependencies and try to update them.

answered Oct 22 '14 at 11:34

Dónal Boyle

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Andrew Santosa · Answer 2 · 2019-08-31T15:20:13.570

24

If the dependency is defined in a <dependencies> block that is within a <dependencyManagement> block, adding it without the version number to a <dependencies> block that is outside <dependencyManagement> may fix the problem.

This is because the purpose of <dependencyManagement> block is to manage dependency versions, and not to install the dependencies. See this other article: Differences between dependencyManagement and dependencies in Maven

edited Aug 31 '19 at 15:20

answered Apr 12 '19 at 16:35

Andrew Santosa

271
2
7

This fixed my problem. Any idea what's up with that? – alext Aug 30 '19 at 07:23
I have added more information to the answer, with a more proper way to resolve the issue. Removing the dependency from `` block as in the original answer wasn't really a good idea, since there could be other `pom.xml`s that depend on it. – Andrew Santosa Aug 31 '19 at 15:24
Sheesh. That saved me from sure insanity. – SriniMurthy Jul 04 '23 at 02:45

score 6 · Accepted Answer · edited Jul 25 '19 at 10:22

6

I resolved this issue by following steps:

1). Remove concerned jar from local /m2 folder. 2). Run mvn eclipse:eclipse command 3). And last run: mvn clean install

Now I am looking for concerned jar in my project class path!

edited Jul 25 '19 at 10:22

xmlParser

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answered Oct 22 '14 at 11:56

S Singh

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I encounted this same problem and after rm -rf ~/.m2 and mvn -U clean pacakge, everything works! – Stephen Lin Sep 13 '16 at 09:59

score 6 · Answer 4 · answered Nov 24 '21 at 03:11

If you are using IntelliJ Idea as your editor then simply follow 3 simple steps:

Right click on your project
Select Maven (last option probably)
Select "Reload project"

And that's it, IntelliJ Idea will download the dependencies and now you can proceed further.

score 1 · Answer 5 · answered Oct 23 '18 at 06:19

1

Try:

Menu -> Project -> Clean -> Select the project

Right Click on the project -> Maven -> Maven clean

Right Click on the project -> Maven -> Maven install

Happened to me and it has fixed my problem. Hope it helps you.

answered Oct 23 '18 at 06:19

Lucas Tadeu

11
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score 0 · Answer 6 · answered Mar 20 '19 at 08:53

0

I deleted .m2 folder and then from eclipse ran maven install then took maven update project. It resolved my issue and jar file got downloaded.

answered Mar 20 '19 at 08:53

PriyaJames

1

score 0 · Answer 7 · answered Jul 30 '20 at 07:38

You can usually resolve these errors by updating Maven dependencies as follows:

Right-click on your top-level project (not on the pom.xml file) in the Project Explorer view. From the menu, choose Maven > Update project

Make sure ForceUpdate of Snapshots/Releases is checked, and click OK.

You'll see a progress indicator in the lower-right-hand corner of the application window. When the update completes, you should be able to generate code normally, and the error markers should disappear.

score 0 · Answer 8 · answered May 01 '21 at 19:56

In IntelliJ

Right-click on your root folder of the project in the Project Explorer view. From the menu, choose Maven > Reload project.

After that, your new dependencies will be downloaded. Then you should be able to generate code normally, and all the error markers will disappear.

maven- not downloading new added dependency in pom.xml file

8 Answers8