GeneralTableTest.ApproximateOffsetOfCompressed test case failed in table_test

[caipengbo]

I ran the unit tests for Rocksdb version 6.29.5 and found that one test case failed:

[ RUN      ] GeneralTableTest.ApproximateOffsetOfCompressed
skipping xpress and xpress compression tests
Value 3529 is not in range [2000, 3525]
/rocksdb/table/table_test.cc:3842: Failure
Value of: Between(c.ApproximateOffsetOf("k03"), 2000, 3525)
  Actual: false
Expected: true
[  FAILED  ] GeneralTableTest.ApproximateOffsetOfCompressed (0 ms)

I looked at the code and found that it was related to the compression algorithm. I successfully installed all the compression algorithms tested, and the version information is as follows:

snappy V1.1.7
zlib V1.2.11
bzip2 V1.0.8
zstd V1.4.4
lz4 V1.9.1

I guess the failure of this test case is related to the effect of the compression algorithm, is that right?

I'd appreciate it if someone could help me out!

[anand1976]

@caipengbo Thanks for bringing this to our attention. It looks like the test is very sensitive to the compression algorithm, as well as other factors like variation in overall file size due to metadata blocks. We probably need a more reliable way of verifying.

[siying]

Do you know with which compression type it failed?

[caipengbo]

Do you know with which compression type it failed?
@siying I ran it again, the failed compression type was snappy. Other types are successful.

[siying]

Hmm... We use Snappy 1.1.3 in our regular tests. Not that big difference. Do you know the actual value when

Between(c.ApproximateOffsetOf("k03"), 2000, 3525)

assertion fails?

Perhaps printf? If it is not far off, we can just expand the range.

[caipengbo]

The failed value is 3529.

[DaMatrix]

I'm getting a similar error, except in my case the value is 3527 and it crashes afterwards.

[ RUN      ] GeneralTableTest.ApproximateOffsetOfCompressed
skipping xpress and xpress compression tests
Value 3527 is not in range [2000, 3525]
table/table_test.cc:4002: Failure
Value of: Between(c.ApproximateOffsetOf("k03"), 2000, 3525)
  Actual: false
Expected: true
terminate called after throwing an instance of 'testing::internal::GoogleTestFailureException'
  what():  table/table_test.cc:4002: Failure
Value of: Between(c.ApproximateOffsetOf("k03"), 2000, 3525)
  Actual: false
Expected: true
Received signal 6 (Aborted)
#0   /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7) [0x7fc40ad08fb7] ??	??:0	
#1   /lib/x86_64-linux-gnu/libc.so.6(abort+0x141) [0x7fc40ad0a921] ??	??:0	
#2   /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x8c957) [0x7fc40b6fd957] ??	??:0	
#3   /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x92ae6) [0x7fc40b703ae6] ??	??:0	
#4   /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x92b21) [0x7fc40b703b21] ??	??:0	
#5   /usr/lib/x86_64-linux-gnu/libstdc++.so.6(__cxa_rethrow+0x49) [0x7fc40b703da9] ??	??:0	
#6   ./table_test(+0x18f5fd) [0x55cc5b5ae5fd] ??	??:0	
#7   ./table_test(+0x17fd2d) [0x55cc5b59ed2d] ??	??:0	
#8   ./table_test(+0x6440d) [0x55cc5b48340d] ??	??:0	
#9   /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fc40acebbf7] ??	??:0	
#10  ./table_test(+0x910da) [0x55cc5b4b00da] ??	??:0	
Aborted (core dumped)

[kovidasurampudi]

Hi, I am facing similar issue and unable to run the last test of make check command.

table/table_test.cc:4218: CompressionType = Snappy
terminate called after throwing an instance of 'testing::internal::GoogleTestFailureException'
what(): table/table_test.cc:4242: Failure
Value of: Between(c.ApproximateOffsetOf("xyz"), 4000, 7075)
Actual: false
Expected: true
Google Test trace:
table/table_test.cc:4218: CompressionType = Snappy
Received signal 6 (Aborted)
Invoking GDB for stack trace...
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f0fb34ea45a in __GI___wait4 (pid=2084504, stat_loc=0x7ffc0ee83d3c, options=0, usage=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:30
30 ../sysdeps/unix/sysv/linux/wait4.c: No such file or directory.
#4 __pthread_kill_implementation (no_tid=0, signo=6, threadid=139705428114432) at ./nptl/pthread_kill.c:44
44 ./nptl/pthread_kill.c: No such file or directory.
#5 __pthread_kill_internal (signo=6, threadid=139705428114432) at ./nptl/pthread_kill.c:78
78 in ./nptl/pthread_kill.c
#6 __GI___pthread_kill (threadid=139705428114432, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
89 in ./nptl/pthread_kill.c
#7 0x00007f0fb3442476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
26 ../sysdeps/posix/raise.c: No such file or directory.
#8 0x00007f0fb34287f3 in __GI_abort () at ./stdlib/abort.c:79
79 ./stdlib/abort.c: No such file or directory.

Could you please help me find the reason for this and how to overcome it?