Include GLIBC version with provided jars

[lfdversluis]

What is the problem the feature request solves?

I have been keeping an eye on this project for a while and with Scala 2.13 supported and some bugfixes, I gave it a go. I tried using the provided JARs online, but when running a query against Spark, I get

java.lang.UnsatisfiedLinkError: /tmp/libcomet-17465649045345702051.so: /lib64/libm.so.6: version GLIBC_2.27' not found (required by /tmp/libcomet-17465649045345702051.so)`

We are running on RHEL 7 which has an older GLIBC. Perhaps the list on the website https://datafusion.apache.org/comet/user-guide/0.10/installation.html can include this information? For now, I think I'll have to build it from source.

Thanks for the nice work so far!

Describe the potential solution

No response

Additional context

No response

[lfdversluis]

I just compiled comet in a docker container running CentOS 7, yet I still get

Comet extension is disabled because of error when loading native lib. Falling back to Spark
java.lang.UnsatisfiedLinkError: /tmp/libcomet-3482603494165917815.so: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by /tmp/libcomet-3482603494165917815.so)

Is something pulling a different libc?
The container definitely has the old glibc

ldd --version
ldd (GNU libc) 2.17

[martin-g]

Building on old OS should work.
This is the solution explained at https://kobzol.github.io/rust/ci/2021/05/07/building-rust-binaries-in-ci-that-work-with-older-glibc.html too

[andygrove]

Thanks for filing the issue @lfdversluis, and thanks for the helpful link, @martin-g. I filed #2511 for building the official releases with an older version of GLIBC. I will aim to do this work for the 0.11.0 release.

[parthchandra]

@andygrove This has been discussed before:
#1499
#932 (comment)

[lfdversluis]

@parthchandra Thanks for those two links, I missed #932, sorry! I kind of agree with not supporting EOL OSes such as RHEL / CentOS 7.

@martin-g thanks for that pointer! Yesterday I compiled rust against the system libs (I hope, I don't have experience with rust) and the jar still didn't run (same error). I'll give that one a go.

[lfdversluis]

This time comet did run (yay) and crashed the JVM 😅

 [...]
Couldn't locate log file from either COMET_CONF_DIR or comet.log.file.path. Using default log configuration which emits to stdout
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGILL (0x4) at pc=0x00007fd166dff790, pid=12, tid=1171
#
# JRE version: OpenJDK Runtime Environment Temurin-17.0.15+6 (17.0.15+6) (build 17.0.15+6)
# Java VM: OpenJDK 64-Bit Server VM Temurin-17.0.15+6 (17.0.15+6, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# C  [libcomet-384294430278044736.so+0x38d4790]  _$LT$log4rs..encode..pattern..parser..Parser$u20$as$u20$core..iter..traits..iterator..Iterator$GT$::next::he2f3f88f45a2cff6+0xca0
#
# No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

The conf dir nor comet.log.file.path are outlined in https://datafusion.apache.org/comet/user-guide/0.10/configs.html
I'll check on how to disable logging for now. Pointers are welcome :)

[parthchandra]

You can set COMET_CONF_DIR to a directory containing a log4rs.yaml file. The default one is located here: https://github.com/apache/datafusion-comet/tree/main/conf