Chris Nauroth created HADOOP-9857:
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Summary: Tests block and sometimes timeout on Windows due to
invalid entropy source.
Key: HADOOP-9857
URL: https://issues.apache.org/jira/browse/HADOOP-9857
Project: Hadoop Common
Issue Type: Bug
Components: build, test
Affects Versions: 3.0.0, 2.1.1-beta
Reporter: Chris Nauroth
Assignee: Chris Nauroth
Tests are configured to set the entropy source to {{file:///dev/urandom}} to
prevent blocking on machines with low entropy. We've observed that on Windows,
this will cause tests to block for 5 seconds trying to access this non-existent
path the first time the process does something that needs entropy, such as
using a {{SecureRandom}} or creating a {{UUID}}. This can cause tests to fail
due to timeouts. In addition to the initial 5-second blocking, this causes the
JVM to fall back to a slower, non-native seed generation implementation.
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