afs commented on issue #3044:
URL: https://github.com/apache/jena/issues/3044#issuecomment-2702017658
A sequence path should be expanded to triple patterns.
```sparql
{ ?x rdfs:label / rdfs:label ?z }
```
```sparql
{
?x rdfs:label ??P1 .
??P1 rdfs:label ?z .
}
```
Looking at the log, the timeout isn't getting forgotten - it is delayed
(presumably by being busy in some tight loop).
The execution plan for the `[20]` does not have a hash join in it. It's
`conditional` and `sequence` but I think the OPTIONALs can massive fan-out and
should be hash left joins.
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