Impala Public Jenkins has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/10222 )

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

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)

Change-Id: Ib16feb406afec83fd2380308a5d24a2793d246fd
Reviewed-on: http://gerrit.cloudera.org:8080/10222
Reviewed-by: Joe McDonnell <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
---
M bin/impala-config.sh
1 file changed, 15 insertions(+), 0 deletions(-)

Approvals:
  Joe McDonnell: Looks good to me, approved
  Impala Public Jenkins: Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Ib16feb406afec83fd2380308a5d24a2793d246fd
Gerrit-Change-Number: 10222
Gerrit-PatchSet: 7
Gerrit-Owner: Lars Volker <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Lars Volker <[email protected]>

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