Bug: Segmentation Fault Error at indexing blocks [180001..182000]

[adriankae]

Describe the bug
Everytime I start electrs I get a seg fault error at indexing the blocks. Specifically at blocks [180001..182000]. It's always in the same spot.
Any help would be appreciated.

Electrs version
v.0.10.5

To Reproduce
Steps to reproduce the behavior:

1. Configure and start electrs
2. Wait
3. See error

Expected behavior
Indexing throws no errors.

Configuration

electrs.toml

Didn't find it in the directory.

[2024-07-12T16:42:00.610Z INFO  electrs::index] indexing 2000 blocks: [180001..182000]
Segmentation fault (core dumped)

running with gdb:

Thread 8 "rocksdb:high" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff58006c0 (LWP 3120)]
0x0000555555ba5775 in rocksdb::CompressionContextCache::Rep::GetZSTDUncompressData() ()

Environment variables: ELECTRS_X=Y;...
Arguments: --foo

System running electrs

• Deployment method: manual from source
• OS name and version: Ubuntu Server 24.04 LTS

Electrum client
Client name (if not upstream desktop Electrum) and version: no electrum installed

Additional context
n/a

[adriankae]

error running with gdb:

[2024-07-12T16:55:11.385Z INFO electrs::index] indexing 2000 blocks: [180001..182000]

Thread 8 "rocksdb:high" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff58006c0 (LWP 3120)]
0x0000555555ba5775 in rocksdb::CompressionContextCache::Rep::GetZSTDUncompressData() ()

[Kixunil]

Did you link dynamically or statically?

[adriankae]

Did you link dynamically or statically?

I linked statically.

[Kixunil]

That's really weird, probably has something to do with C++ compilation. Makes me rethink my previous claim that maybe pure Rust impl isn't that interesting.

[adriankae]

When I try to link dynamically i get these errors:

error[E0425]: cannot find function `rocksdb_block_based_options_set_block_cache_compressed` in crate `ffi`
   --> /home/electrs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/electrs-rocksdb-0.19.0-e3/src/db_options.rs:532:18
    |
532 |             ffi::rocksdb_block_based_options_set_block_cache_compressed(self.inner, cache);
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: a function with a similar name exists: `rocksdb_block_based_options_set_block_cache`
    |
   ::: /home/electrs/electrs/target/release/build/electrs-librocksdb-sys-9f28095edbfce9a7/out/bindings.rs:3:59227
    |
3   | ... { pub fn rocksdb_block_based_options_set_block_cache (options : * mut rocksdb_block_based_table_options_t , block_cache : * mut rocksdb_cache_t) ; ...
    |       ---------------------------------------------------------------------------------------------------------------------------------------------- similarly named function `rocksdb_block_based_options_set_block_cache` defined here

error[E0425]: cannot find function `rocksdb_block_based_options_set_block_cache_compressed` in crate `ffi`
   --> /home/electrs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/electrs-rocksdb-0.19.0-e3/src/db_options.rs:553:18
    |
553 |             ffi::rocksdb_block_based_options_set_block_cache_compressed(self.inner, cache.0.inner);
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: a function with a similar name exists: `rocksdb_block_based_options_set_block_cache`
    |
   ::: /home/electrs/electrs/target/release/build/electrs-librocksdb-sys-9f28095edbfce9a7/out/bindings.rs:3:59227
    |
3   | ... { pub fn rocksdb_block_based_options_set_block_cache (options : * mut rocksdb_block_based_table_options_t , block_cache : * mut rocksdb_cache_t) ; ...
    |       ---------------------------------------------------------------------------------------------------------------------------------------------- similarly named function `rocksdb_block_based_options_set_block_cache` defined here

error[E0061]: this function takes 9 arguments but 5 arguments were supplied
    --> /home/electrs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/electrs-rocksdb-0.19.0-e3/src/db_options.rs:2525:13
     |
2525 |               ffi::rocksdb_options_set_plain_table_factory(
     |  _____________^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
2526 | |                 self.inner,
2527 | |                 options.user_key_length,
2528 | |                 options.bloom_bits_per_key,
2529 | |                 options.hash_table_ratio,
2530 | |                 options.index_sparseness,
2531 | |             );
     | |_____________- multiple arguments are missing
     |
note: function defined here
    --> /home/electrs/electrs/target/release/build/electrs-librocksdb-sys-9f28095edbfce9a7/out/bindings.rs:3:88313
     |
3    | ...size) ; } extern "C" { pub fn rocksdb_options_set_plain_table_factory (arg1 : * mut rocksdb_options...
     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: provide the arguments
     |
2525 |             ffi::rocksdb_options_set_plain_table_factory(self.inner, options.user_key_length, options.bloom_bits_per_key, options.hash_table_ratio, options.index_sparseness, /* usize */, /* i8 */, /* u8 */, /* u8 */);
     |                                                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Some errors have detailed explanations: E0061, E0425.
For more information about an error, try `rustc --explain E0061`.
error: could not compile `electrs-rocksdb` (lib) due to 3 previous errors

[Kixunil]

Yes, Ubuntu has a different rocksdb version than Debian. I wish they didn't break the API so much.

[adriankae]

Is there anything I could do?
I'm pretty much out of ideas...

[Kixunil]

I don't have many ideas either. Maybe try switching compiler to clang? (If you used g++, or vice-versa).

[romanz]

@adriankae Does the error reproduce if the index DB is rebuilt from scratch?

[bkjaerland]

I have the exact same issue. For me it did not help to rebuild the DB from scratch.

[bkjaerland]

Found the issue for me, I was missing the build-essential package. After installing it and rebuilding electrs it works like a charm.

[Kixunil]

How come it even compiled without it?! That's super weird.

[antonilol]

Is this a rocksdb issue? I think somewhere a compile time error should be introduced.

[xjmzx]

Confirming the same issue (at same block height) and the same fix build-essential was not installed.

OS: Ubuntu 24.04.1 LTS x86_64
Kernel: 6.8.0-41-generic