Qifan Chen has uploaded a new patch set (#2). ( 
http://gerrit.cloudera.org:8080/16238 )

Change subject: IMPALA-10007: Impala development environment does not support 
Ubuntu 20.4
......................................................................

IMPALA-10007: Impala development environment does not support
Ubuntu 20.4

This work addresses the current limitation in Impala development
environment in that Ubuntu 20.4 is not supportd. The fix modifies
bootstrap_system.sh and bootstrap_toolchain.py to specifically
allow the bootstrapping of the development environment on a maching
running Ubuntu 20.4. Limited use shows that the environment is useful
and stable, similar to the one running on Ubuntu 18.4.

Testing on a box running Ubuntu 20.4:
1. Bootstrapped the entire Impala development environment;
2. Interacted with the enviroment in following aspects
    gdb
    jdb
    clang-format
    impalad GUI
    vim
3. Ran all tests

Limitations found with Ubuntu 20.4 environment.
1. gdb in Impala toolchain is not compatible with Impala C++ test
   code ${IMPALA_HOME}/be/build/latest/service\
   /unifiedbetests (invoked by ${IMPALA_HOME}/be/build/latest/\
   scheduling/admission-controller-test) and reports the following
   error, after attaching to the test process.

   BFD (GNU Binutils) 2.25.51 internal error, aborting at elf64-x86-64.c
   ine 5583 in elf_x86_64_get_plt_sym_val

Change-Id: I4f592f60881fd8f34e2bf393a76f5a921505010a
---
M bin/bootstrap_system.sh
M bin/bootstrap_toolchain.py
2 files changed, 16 insertions(+), 3 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/38/16238/2
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I4f592f60881fd8f34e2bf393a76f5a921505010a
Gerrit-Change-Number: 16238
Gerrit-PatchSet: 2
Gerrit-Owner: Qifan Chen <qc...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>

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