Add support for multiple GCS file system instances

[majetideepak]

Description

Currently only one is supported
https://github.com/facebookincubator/velox/blob/main/velox/connectors/hive/storage_adapters/gcs/RegisterGcsFileSystem.cpp

[majetideepak]

@JkSelf will you be able to help with this?

[JkSelf]

@majetideepak Yes. I will follow up this issue. Thanks.

[JkSelf]

@majetideepak I successfully compiled the GCS test in my local environment using the following command:
make release NUM_THREADS=110 MAX_HIGH_MEM_JOBS=110 MAX_LINK_JOBS=110 'EXTRA_CMAKE_FLAGS=-DCMAKE_CXX_FLAGS="-Wno-missing-field-initializers" -DVELOX_ENABLE_PARQUET=ON -DVELOX_BUILD_TESTING=ON -DVELOX_MONO_LIBRARY=ON -DVELOX_BUILD_RUNNER=OFF -DVELOX_ENABLE_GCS=ON -DCMAKE_BUILD_TYPE=Release'

However, I encountered an issue when running the unit test. The following exception was thrown:

root@sr249:/home/lab01/velox# ./_build/release/velox/connectors/hive/storage_adapters/gcs/tests/velox_gcsfile_test --gtest_filter=GcsFileSystemTest.readFile
Running main() from /mnt/DP_disk1/code/gluten/ep/build-velox/build/velox_ep/_build/release/_deps/gtest-src/googletest/src/gtest_main.cc
Note: Google Test filter = GcsFileSystemTest.readFile
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from GcsFileSystemTest
[ RUN      ] GcsFileSystemTest.readFile
/home/lab01/velox/./velox/connectors/hive/storage_adapters/gcs/tests/GcsEmulator.h:125: Failure
Value of: bucket.ok()
  Actual: false
Expected: true
Failed to create bucket <test1-gcs>, status=PERMISSION_DENIED: Permanent error, with a last message of <!-- IE friendly error message walkround.
     if error message from server is less than
     512 bytes IE v5+ will use its own error
     message instead of the one returned by
     server.                                 -->

Do you have any suggestions on how to resolve this issue? Thanks.

[majetideepak]

@JkSelf I am not sure why this error is thrown. Can you share some details about your environment? Likely an issue with the GcsEmulator.

[JkSelf]

@majetideepak It appears that setting the HTTP and HTTPS proxies caused this error. After removing the proxy settings, the test can work properly. And I'll continue implementing this feature. Thanks for your help.