[IGNITE-3928] Hadoop: Print warning if Hadoop is found in classpath of parent classloader.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7
• Fix Version/s: 1.8
• Component/s: hadoop
• Assignee: Vladimir Ozerov
• Reporter: Vladimir Ozerov
• Created: 19/Sep/16 10:57
• Updated: 23/Sep/16 15:28
• Resolved: 23/Sep/16 15:28

Description

Normally parent classloader should not have Hadoop in classpath. Otherwise we may end up in JAR hell situation.

We need to probe parent classloader for Hadoop and print a warning if Hadoop is likely to be in the classpath. E.g. we can probe for FileSystem or Configuration class.