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Nexus can not download dependencies of spring-boot

I am using a nexus, which i did not configure. I log in with remote desktop on the system that runs windows server 2012. When i want to build my spring-boot application and i run the goal mvn clean package it downloands several dependencies and then fails with a connection refused error. I do not understand this. Why was is possible to download the first few, but not the spring-boot-starter-aop jar? What connection is refused? The one that is used to download the otheres? Here is my error report:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Application
[INFO] ------------------------------------------------------------------------
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/aspectj/aspectjweaver/1.9.6/aspectjweaver-1.9.6.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/com/zaxxer/HikariCP/3.4.5/HikariCP-3.4.5.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/springframework/spring-jdbc/5.3.6/spring-jdbc-5.3.6.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/jakarta/transaction/jakarta.transaction-api/1.3.3/jakarta.transaction-api-1.3.3.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/jakarta/persistence/jakarta.persistence-api/2.2.3/jakarta.persistence-api-2.2.3.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/hibernate/hibernate-core/5.4.30.Final/hibernate-core-5.4.30.Final.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/springframework/data/spring-data-jpa/2.4.8/spring-data-jpa-2.4.8.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/springframework/spring-aspects/5.3.6/spring-aspects-5.3.6.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/liquibase/liquibase-core/3.10.3/liquibase-core-3.10.3.pom
Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/postgresql/postgresql/42.2.19/postgresql-42.2.19.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 11.778 s
[INFO] Finished at: 2021-11-22T09:16:05+01:00
[INFO] Final Memory: 19M/67M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project ecg-worklist: Could not resolve dependencies for project de.mdeset.worklist:ecg-worklist:war:1.0.0: Failed to collect dependencies at org.springframework.boot:
ot-starter-data-jpa:jar:2.4.5 -> org.springframework.boot:spring-boot-starter-aop:jar:2.4.5 -> org.aspectj:aspectjweaver:jar:1.9.6: Failed to read artifact descriptor for org.aspectj:aspectjweaver:jar:
uld not transfer artifact org.aspectj:aspectjweaver:pom:1.9.6 from/to Nexus (http://192.168.1.142:8081/nexus/content/groups/public/): Connect to 192.168.1.142:8081 [/192.168.1.142] failed: Connection r
onnect -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

It is not downloading any of them.
If you look at the order, it is actually failing for the first one Downloading: http://192.168.1.142:8081/nexus/content/groups/public/org/aspectj/aspectjweaver/1.9.6/aspectjweaver-1.9.6.pom.
It is telling you it is downloading, but then during the first attempt it fails to connect.
My suggestion is to try the URL on your browser without maven first to see if you can access it: http://192.168.1.142:8081/nexus/content/groups/public/ in the browser
If download was successfull of any of those dependencies, you would see (downloading/downloaded)
Downloading from cv-release: https://arm./springframework/session/spring-session-bom/2021.0.3/spring-session-bom-2021.0.3.pom
Downloaded from cv-release: https://arm./org/springframework/session/spring-session-bom/2021.0.3/spring-session-bom-2021.0.3.pom (2.7 kB at 15 kB/s)

Maven build failure for Spring boot with Alexa skill kit

I tried to build the spring boot project for AWS lambda and deploy it. I try to use the following command:
mvn assembly:assembly -DdescriptorId=jar-with-dependencies package
to create a .JAR file.
My output:
[INFO]
[INFO] --- spring-boot-maven-plugin:1.5.9.RELEASE:repackage (default) # requestTestDemoFromAWSLambda ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 13.668 s
[INFO] Finished at: 2018-01-23T17:06:21+02:00
[INFO] Final Memory: 89M/538M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.9.RELEASE:repackage (default) on project requestTestDemoFromAWSLambda: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:1.5.9.RELEASE:repackage failed: Unable to rename 'D:\alexaWork\requestTestDemoFromAWSLambda\target\requestTestDemoFromAWSLambda-0.0.1-SNAPSHOT.jar' to 'D:\alexaWork\requestTestDemoFromAWSLambda\target\requestTestDemoFromAWSLambda-0.0.1-SNAPSHOT.jar.original' -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
As you see is not working

Unable to download groovy.jar

Any help appreciated.
I'm new to Maven. I got the below command from tutorials point
mvn archetype:generate -DgroupId=com.tutorialpoint.app -DartifactId=camel-first-app -DarchetypeGroupId=org.apache.camel.archetypes -DarchetypeArtifactId=camel-archetype-spring -DinteractiveMode=false
it is failing with below error:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> maven-archetype-plugin:3.0.1:generate (default-cli) # standalone-pom >>>
[INFO]
[INFO] <<< maven-archetype-plugin:3.0.1:generate (default-cli) # standalone-pom <<<
[INFO]
[INFO] --- maven-archetype-plugin:3.0.1:generate (default-cli) # standalone-pom ---
Downloading:
http://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy/1.8.3/groovy-1.8.3.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.981s
[INFO] Finished at: Tue Nov 14 23:11:42 IST 2017
[INFO] Final Memory: 10M/184M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:3.0.1:generate (default-cli) on project standalone-pom: Execution default-cli of goal org.apache.maven.plugins:maven-archetype-plugin:3.0.1:generate failed: Plugin org.apache.maven.plugins:maven-archetype-plugin:3.0.1 or one of its dependencies could not be resolved: Could not transfer artifact org.codehaus.groovy:groovy:jar:1.8.3 from/to central (http://repo.maven.apache.org/maven2): GET request of: org/codehaus/groovy/groovy/1.8.3/groovy-1.8.3.jar from central failed: Connection reset -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
Can someone please help.

The relevant error is pointing to a connection problem:
Could not transfer artifact org.codehaus.groovy:groovy:jar:1.8.3
from/to central (http://repo.maven.apache.org/maven2): GET request
of: org/codehaus/groovy/groovy/1.8.3/groovy-1.8.3.jar from central
failed: Connection reset
The command which you posted actually runs fine on my machine. If you execute this maven command and you do not have the Groovy libraries yet, you will see that it actually downloads the following files:
https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy/1.8.3/groovy-1.8.3.pom
https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy/1.8.3/groovy-1.8.3.jar
It might be that you have only access to the internet via a proxy. In this case you will need to setup a proxy in the Maven configuration.
This blog here contains a fairly good description on how to setup a proxy for Maven, so that Maven can access the repository libraries.
Another option to tackle your problem would be to manually download this file using your browser:
https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy/1.8.3/groovy-1.8.3.jar
And then install it in your repository manually using:
mvn install:install-file -Dfile=<path-to-file> -DgroupId=org.codehaus.groovy \
-DartifactId=groovy -Dversion=1.8.3 -Dpackaging=jar
But normally you should not have to do this manual download + installation. Maven should be doing this for you.

Zeppelin build failure - Failed to run task: 'grunt --no-color' failed

I want to install Apache Zeppelin on OSX 10.8, but build fails for some mysterious reasons. Specs: Java 1.7, Maven 3.3, node v0.12.4 and grunt v0.1.13.
I'm running the following command:
mvn clean package -DskipTests
And I am getting the following output :
[INFO] Zeppelin: web Application .......................... FAILURE [ 18.310 s]
[INFO] Zeppelin: Server ................................... SKIPPED
[INFO] Zeppelin: Packaging distribution ................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 07:53 min
[INFO] Finished at: 2016-01-14T18:32:13-05:00
[INFO] Final Memory: 78M/387M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.github.eirslett:frontend-maven-plugin:0.0.23:grunt (grunt build) on project zeppelin-web: Failed to run task: 'grunt --no-color' failed. (error code 3) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :zeppelin-web
It seems to be some errors with grunt, but I'm not sure.

Cannot run mvn clean

When i run "mvn clean " getting error message like below on windows 7 PC.
i tried re-installing maven still error not solved. All other command except mvn clean is running fine.
[INFO] Scanning for projects...
[INFO]
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building SpringMVC Maven Webapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.apache.maven.plugins:maven-clean-plugin:jar:2.5 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.222 s
[INFO] Finished at: 2014-03-24T13:02:22+05:30
[INFO] Final Memory: 4M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5: 1 problem was encountered while building the effective model
[ERROR] [FATAL] Non-parseable POM C:\Users\suresh\.m2\repository\org\apache\maven\plugins\maven-clean-plugin\2.5\maven-clean-plugin-2.5.pom: end tag name </head> must be the same as start tag <meta> from line 4 (position: TEXT seen ...<meta http-equiv="pragma" content="no-cache">\r\n</head>... #5:8) # line 5, column 8
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException

Seems like somehow your clean plugin got corrupted when downloading. Just delete the C:\Users\suresh\.m2\repository\org\apache\maven\plugins\maven-clean-plugin\2.5 directory entirely and retry.