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BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
PG Bug reporting form <noreply@postgresql.org> — 2023-05-24T13:28:46Z
The following bug has been logged on the website: Bug reference: 17943 Logged by: Hans Buschmann Email address: buschmann@nidsa.net PostgreSQL version: 15.3 Operating system: Fedora 38 x86-64 Description: I tried to restore our standard db from a recent dump on PostgreSQL 15.3 installed from PGDG repositories with dnf. During pg_restore I got the following error message: pg_restore: error: could not execute query: ERROR: could not load library "/usr/pgsql-15/lib/llvmjit.so": /usr/pgsql-15/lib/llvmjit.so: undefined symbol: LLVMBuildGEP Command was: REFRESH MATERIALIZED VIEW archiv.mv_max_fac_order; pg_restore: warning: errors ignored on restore: 1 For our system, jit isn't really important, but enabled in configuration. So the error occurs only occasional here. At the first attempt the following postgres / llvm packages where installed: postgresql15.x86_64 15.3-1PGDG.f38 @pgdg15 postgresql15-contrib.x86_64 15.3-1PGDG.f38 @pgdg15 postgresql15-devel.x86_64 15.3-1PGDG.f38 @pgdg15 postgresql15-docs.x86_64 15.3-1PGDG.f38 @pgdg15 postgresql15-libs.x86_64 15.3-1PGDG.f38 @pgdg15 postgresql15-llvmjit.x86_64 15.3-1PGDG.f38 @pgdg15 postgresql15-server.x86_64 15.3-1PGDG.f38 @pgdg15 llvm.x86_64 16.0.3-1.fc38 @updates llvm-devel.x86_64 16.0.3-1.fc38 @updates llvm-libs.i686 16.0.3-1.fc38 @updates llvm-libs.x86_64 16.0.3-1.fc38 @updates llvm-static.x86_64 16.0.3-1.fc38 @updates llvm-test.x86_64 16.0.3-1.fc38 @updates llvm15-libs.x86_64 15.0.7-4.fc38 @fedora Even after dnf remove llvm15-libs (leftover from a system upgrade from Fedora 37) the same error persisted. Any clues? Hans Buschmann
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Re: BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
Thomas Munro <thomas.munro@gmail.com> — 2023-05-25T03:20:44Z
On Thu, May 25, 2023 at 4:19 AM PG Bug reporting form <noreply@postgresql.org> wrote:> > Any clues? Is it possible that whoever packaged that compiled it against LLVM 15 but then put LLVM 16 into the package depencencies? I'm not a Fedora user so that might be a silly question... but do you still have the ability to install LLVM 15? Unfortunately PostgreSQL can't use LLVM16 yet, because we need to make some changes (hopefully in the next point release): https://www.postgresql.org/message-id/flat/CA+hUKGKNX_=f+1C4r06WETKTq0G4Z_7q4L4Fxn5WWpMycDj9Fw@mail.gmail.com
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AW: BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
Hans Buschmann <buschmann@nidsa.net> — 2023-05-25T07:30:58Z
Hello Thomas, Thank you for your information about LLVM16 support. I noticed the discussion in hackers. I wanted to point out that I used the standard repositories from PGDG15. As to my knowledge they are packaged by Devrim, so this is the standard distribution for RedHat-style Linux on PGDG. (This is shown by the dnf list lines in my OM) I am not trying to use LLVM on my platform (tiny data, optimized SQL etc.) but I wanted to notice everybody that there are unreferenced symbols in llvmjit.so, something that should not happen. I have no idea where this come from nor where it is used, but the unreferenced symbols should be at least masked with dummy rountines (or avoided) to prevent the error for other users where the problem matters much more! Unfortunately this occurs on pg_restore, the ultimate backup/restore of a database, and data are not restored correctly and must be corrected manually afterwords. Perhaps you could contact Devrim for clarification... Hans Buschmann ________________________________
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Re: BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
Devrim Gündüz <devrim@gunduz.org> — 2023-05-25T17:21:30Z
Hi, On Thu, 2023-05-25 at 15:20 +1200, Thomas Munro wrote: > Is it possible that whoever packaged that compiled it against LLVM 15 > but then put LLVM 16 into the package depencencies? Me. The answer is yes. I hit the same issue on my laptop a couple of days ago. Will rebuild RPMs against LLVM15 (which is a separate package), and will release until Monday. Regards, -- Devrim Gündüz Open Source Solution Architect, PostgreSQL Major Contributor Twitter: @DevrimGunduz , @DevrimGunduzTR
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Re: BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
Laurenz Albe <laurenz.albe@cybertec.at> — 2023-09-15T07:06:13Z
On Thu, 2023-05-25 at 18:21 +0100, Devrim Gündüz wrote: > On Thu, 2023-05-25 at 15:20 +1200, Thomas Munro wrote: > > Is it possible that whoever packaged that compiled it against LLVM 15 > > but then put LLVM 16 into the package depencencies? > > Me. The answer is yes. > > I hit the same issue on my laptop a couple of days ago. Will rebuild > RPMs against LLVM15 (which is a separate package), and will release > until Monday. I still see that error with the 16.0 packages on Fedora 38. Yours, Laurenz Albe
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Re: BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
Devrim Gündüz <devrim@gunduz.org> — 2023-09-15T11:28:13Z
Hi Laurenz, On Fri, 2023-09-15 at 09:06 +0200, Laurenz Albe wrote: > I still see that error with the 16.0 packages on Fedora 38. Unfortunately Fedora 38 does not have clang15 package, so we'll need to wait until PostgreSQL supports LLVM 16. Regards, -- Devrim Gündüz Open Source Solution Architect, PostgreSQL Major Contributor Twitter: @DevrimGunduz , @DevrimGunduzTR
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Re: BUG #17943: Undefined symbol LLVMBuildGEP in llvmjit.so during pg_restore
Laurenz Albe <laurenz.albe@cybertec.at> — 2023-09-15T16:09:17Z
On Fri, 2023-09-15 at 12:28 +0100, Devrim Gündüz wrote: > On Fri, 2023-09-15 at 09:06 +0200, Laurenz Albe wrote: > > I still see that error with the 16.0 packages on Fedora 38. > > Unfortunately Fedora 38 does not have clang15 package, so we'll need to > wait until PostgreSQL supports LLVM 16. I see. Wouldn't it be better not to ship postgresql16-llvmjit, or at least to ship PostgreSQL with "jit = off"? Yours, Laurenz Albe