Cloudera Manager cannot find Spark2 parcel

[#1]

I have cloudera Manager 5.12.1 and After having installed the CSD following the first steps of this guide: https://www.cloudera.com/documentation/spark2/latest/topics/spark2_installing.html

but after restarting the Cloudera Manager, even if it automatically added the remote parcel repository URL (effect from the installation of the CSD) . I cannot find the new parcel in order to download it.

I digged into the logs and I found this warning

4:18:57.328 PM 	WARN 	ReadWriteDatabaseTaskCallable 	

Error while executing CmfEntityManager task
java.lang.NullPointerException
	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191)
	at com.google.common.collect.Collections2.filter(Collections2.java:92)
	at com.cloudera.parcel.components.ParcelDownloaderImpl$RepositoryInfo.getParcelsWithValidNames(ParcelDownloaderImpl.java:673)
	at com.cloudera.parcel.components.ParcelDownloaderImpl$RepositoryInfo.getSortedParcels(ParcelDownloaderImpl.java:691)
	at com.cloudera.parcel.components.ParcelDownloaderImpl.syncRemoteRepos(ParcelDownloaderImpl.java:368)
	at com.cloudera.parcel.components.ParcelDownloaderImpl$1.run(ParcelDownloaderImpl.java:438)
	at com.cloudera.parcel.components.ParcelDownloaderImpl$1.run(ParcelDownloaderImpl.java:433)
	at com.cloudera.cmf.persist.ReadWriteDatabaseTaskCallable.call(ReadWriteDatabaseTaskCallable.java:36)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

maybe it cannot download the parcels? why? I have no firewall or proxy activated.

I have CENTOS7

[#2 · Accepted solution]

There's a parcel from https://archive.cloudera.com/sqoop-connectors/parcels/latest/ (which is included by default) that seems to give problems. Try to exclude it.

[#3]

I didn't get why is this a problem for Cloudera. But excluding it, it actually worked!