The container 'Maven Dependencies' references non existing library - maven-2

Question

I use SpringSource Tool Suite 2.3.0. Recently I added the commons-compress dependency to pom.xml as required by jackrabbit 2.0 dependency. Updating maven dependencies console shows:
"Missing artifact org.apache.commons:commons-compress:jar:1.0:compile"
I checked the Problems view and it shows the following error:
The container 'Maven Dependencies' references non existing library 'C:\Documents and Settings\AElshereay.m2\repository\org\apache\commons\commons-compress\1.0\commons-compress-1.0.jar'.
Also:
cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'config:simple'.
I have no idea what is that last! And if it has anything to do to not download the mentioned jar from maven repository even it's there!
Please, can anyone help me to resolve this problem?
Thank you in advance.

Answer 1

I'm not 100% sure about the last error message but the two first one are definitely related: you declared a dependency to the POM so the .classpath is updated to point on it in your local repository but the file is can't be find in it and Eclipse/STS complains about this.
Now, I tried to declare the commons-compress dependency in a POM:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.0</version>
</dependency>
And, while I can see some complains about checksum validations:
1/23/10 5:11:10 AM CET: Downloading central : org/apache/commons/commons-compress/1.0/commons-compress-1.0.pom
1/23/10 5:11:10 AM CET: Downloaded [central] -> http://repo1.maven.org/maven2/org/apache/commons/commons-compress/1.0/commons-compress-1.0.pom
1/23/10 5:11:10 AM CET: [WARN] *** CHECKSUM FAILED - Checksum failed on download: local = '325980a09dbbd0c108ece8e7733b462b00e6f2a8'; remote = 'commons-compress-1.0.pom:' - RETRYING
1/23/10 5:11:10 AM CET: Downloading central : org/apache/commons/commons-compress/1.0/commons-compress-1.0.pom
1/23/10 5:11:10 AM CET: Downloaded [central] -> http://repo1.maven.org/maven2/org/apache/commons/commons-compress/1.0/commons-compress-1.0.pom
1/23/10 5:11:11 AM CET: [WARN] *** CHECKSUM FAILED - Checksum failed on download: local = '325980a09dbbd0c108ece8e7733b462b00e6f2a8'; remote = 'commons-compress-1.0.pom:' - IGNORING
1/23/10 5:11:12 AM CET: Downloading central : org/apache/commons/commons-compress/1.0/commons-compress-1.0.jar
1/23/10 5:11:15 AM CET: Downloaded [central] -> http://repo1.maven.org/maven2/org/apache/commons/commons-compress/1.0/commons-compress-1.0.jar
1/23/10 5:11:16 AM CET: [WARN] *** CHECKSUM FAILED - Checksum failed on download: local = '995ae384a0b1e2c66269e6bc5198db8561fb45a2'; remote = 'commons-compress-1.0.jar:' - RETRYING
1/23/10 5:11:16 AM CET: Downloading central : org/apache/commons/commons-compress/1.0/commons-compress-1.0.jar
1/23/10 5:11:18 AM CET: Downloaded [central] -> http://repo1.maven.org/maven2/org/apache/commons/commons-compress/1.0/commons-compress-1.0.jar
1/23/10 5:11:18 AM CET: [WARN] *** CHECKSUM FAILED - Checksum failed on download: local = '995ae384a0b1e2c66269e6bc5198db8561fb45a2'; remote = 'commons-compress-1.0.jar:' - IGNORING
The artifacts gets downloaded.
So please check that you didn't configure the central repository with a checksumPolicy
set to fail. Look for something like that in your settings.xml or in global settings used by m2eclipse (Windows > Preferences > Maven > Installations) or in a project profile:
<checksumPolicy>fail</checksumPolicy>
If you can't find anything like that, then a workaround would be to install commons-compress manually.