Lars Volker has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/10244


Change subject: Warn about Hadoop / Java version incompatibility
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Warn about Hadoop / Java version incompatibility

Running Hadoop 3 with Java 7 can result in some obscure error messages.
This change adds a warning to impala-config.sh when using Hadoop 3 with
Java 7.

   Your development environment is configured for Hadoop 3 and Java 7.
   Hadoop 3 requires at least Java 8. Your JAVA binary currently points
   to /usr/lib/jvm/java-7-oracle-amd64/bin/java and reports the
   following version:

   java version "1.7.0_75"
   Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
   Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

It also catches failure of the minicluster start and prints an
additional warning when running with Hadoop 3 and Java 7.

Change-Id: I4d8b505cf045eeb562d16ce4ce09da0712dc03eb
---
M bin/impala-config.sh
M testdata/bin/run-mini-dfs.sh
2 files changed, 33 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/44/10244/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I4d8b505cf045eeb562d16ce4ce09da0712dc03eb
Gerrit-Change-Number: 10244
Gerrit-PatchSet: 1
Gerrit-Owner: Lars Volker <l...@cloudera.com>

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