[GitHub] [incubator-doris] acelyc111 opened a new issue #3375: Bloom filter bits buffer is not initialized as 0

[GitBox <gi...@apache.org>]

acelyc111 opened a new issue #3375:
URL: https://github.com/apache/incubator-doris/issues/3375


   **Describe the bug**
   I found this bug when I run unit tests in [ASAN](http://doris.incubator.apache.org/documentation/cn/developer-guide/debug-tool.html#asan) mode,
   `TEST_F(BlockBloomFilterTest, SP)` in be/test/olap/rowset/segment_v2/block_bloom_filter_test.cpp failed definitely.
   ```
   $ ${DORIS_TEST_BINARY_DIR}/olap/rowset/segment_v2/block_bloom_filter_test
   [==========] Running 3 tests from 1 test case.
   [----------] Global test environment set-up.
   [----------] 3 tests from BlockBloomFilterTest
   [ RUN      ] BlockBloomFilterTest.Normal
   [       OK ] BlockBloomFilterTest.Normal (1 ms)
   [ RUN      ] BlockBloomFilterTest.SP
   /home/laiyingchun/ap_doris/be/test/olap/rowset/segment_v2/block_bloom_filter_test.cpp:142: Failure
   Expected: ((double)false_count2 / (num * 9)) <= (_fpp), actual: 0.312934 vs 0.05
   [  FAILED  ] BlockBloomFilterTest.SP (7 ms)
   [ RUN      ] BlockBloomFilterTest.slice
   [       OK ] BlockBloomFilterTest.slice (1 ms)
   [----------] 3 tests from BlockBloomFilterTest (9 ms total)
   
   [----------] Global test environment tear-down
   [==========] 3 tests from 1 test case ran. (9 ms total)
   [  PASSED  ] 2 tests.
   [  FAILED  ] 1 test, listed below:
   [  FAILED  ] BlockBloomFilterTest.SP
   ```
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1. Run unit test `${DORIS_TEST_BINARY_DIR}/olap/rowset/segment_v2/block_bloom_filter_test` in ASAN mode for the old unit test code, or in default (release) mode for the improved unit test code in https://github.com/apache/incubator-doris/pull/3372.
   
   **Expected behavior**
   All unit tests should passed.
   That is to say **false positive proportion** of bloom filter should be in a very low proportion as what we specify the parameter when we initilize BloomFilter, for example 0.05.


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