[CI] Failed for task ':x-pack:qa:repository-old-versions:javaRestTestAfterRestart#6_8_20'

[ywangd]

CI Link

https://gradle-enterprise.elastic.co/s/bn2fsotfl46mm

Repro line

N/A

Does it reproduce?

Didn't try

Applicable branches

8.8

Failure history

No response

Failure excerpt

The error on the surface is

process was found dead while waiting for ports files

which seems to be transient due to cluster not bootstrapped in time. But there are lots of exceptions like the following in the log file which seems to worth a closer look by relevant experts

» [2023-06-07T00:58:21,221][WARN ][r.suppressed             ] [6-8-20-0] path: /mounted_shared_cache_test_index/_doc/testdoc5, params: {index=mounted_shared_cache_test_index, id=testdoc5} org.elasticsearch.transport.RemoteTransportException: [6-8-20-1][127.0.0.1:38717][indices:data/read/get[s]]
»  Caused by: java.lang.IllegalStateException: get operations not allowed on a legacy index
»   at org.elasticsearch.index.shard.IndexShard.get(IndexShard.java:1219)
»   at org.elasticsearch.index.get.ShardGetService.innerGet(ShardGetService.java:204)
»   at org.elasticsearch.index.get.ShardGetService.get(ShardGetService.java:107)
»   at org.elasticsearch.index.get.ShardGetService.get(ShardGetService.java:80)
»   at org.elasticsearch.action.get.TransportGetAction.shardOperation(TransportGetAction.java:114)
»   at org.elasticsearch.action.get.TransportGetAction.shardOperation(TransportGetAction.java:34)
»   at org.elasticsearch.action.support.single.shard.TransportSingleShardAction.lambda$asyncShardOperation$0(TransportSingleShardAction.java:103)
»   at org.elasticsearch.action.ActionRunnable$2.accept(ActionRunnable.java:50)
»   at org.elasticsearch.action.ActionRunnable$2.accept(ActionRunnable.java:47)
»   at org.elasticsearch.action.ActionRunnable$3.doRun(ActionRunnable.java:72)
»   at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)
»   at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)
»   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
»   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
»   at java.lang.Thread.run(Thread.java:1623)

[elasticsearchmachine]

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

[elasticsearchmachine]

Pinging @elastic/es-distributed (Team:Distributed)