Segfault in new bulk query handling Diskbbq

[benwtrent]

Elasticsearch Version

main

Installed Plugins

No response

Java Version

bundled

OS Version

avx512 CPUs

Problem Description

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x00007f3d19094ac0, pid=182, tid=571

JRE version: OpenJDK Runtime Environment (25.0.1+8) (build 25.0.1+8-27)

Java VM: OpenJDK 64-Bit Server VM (25.0.1+8-27, mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)

Problematic frame:

C [libvec.so+0x2ac0] dot7u_bulk_2+0x280

Core dump will be written. Default location: /usr/share/elasticsearch/logs/core

An error report file with more information is saved as:

Steps to Reproduce

Bulk scoring on avx512

Logs (if relevant)

No response

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)

[benwtrent]

The troubling PR has been reverted. Removing blocker.

Need to investigate

[ChrisHegarty]

The problem is using size_t, which is 64 bit on 64 bit platforms, for length and count, whereas we model these as 32 bit ints in java. Fixing in #138317