[8.19] ESQL: Fix Driver creating status with a live list of operators (#132260) #132340
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…ic#132260) `DriverStatus` is an immutable record created by the Driver. However, its components are not inherently immutable. This PR fixes a live collection used by the Driver, that was being directly put into the status, leading to `ConcurrentModificationException`s when reading it (Through the Task list API, for example). Some example errors: ``` java.util.ConcurrentModificationException at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1096) at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1050) at org.elasticsearch.compute.operator.DriverStatus.toXContent(DriverStatus.java:134) at org.elasticsearch.xcontent@9.2.0/org.elasticsearch.xcontent.XContentBuilder.value(XContentBuilder.java:993) at org.elasticsearch.xcontent@9.2.0/org.elasticsearch.xcontent.XContentBuilder.field(XContentBuilder.java:978) at org.elasticsearch.server@9.2.0/org.elasticsearch.tasks.TaskInfo.toXContent(TaskInfo.java:113) at org.elasticsearch.server@9.2.0/org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup.toXContent(TaskGroup.java:63) at org.elasticsearch.server@9.2.0/org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup.toXContent(TaskGroup.java:67) at org.elasticsearch.server@9.2.0/org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse.lambda$groupedByParent$10(ListTasksResponse.java:183) ``` And: ``` java.util.ConcurrentModificationException at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1096) at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1050) at org.elasticsearch.compute.operator.DriverStatus.documentsFound(DriverStatus.java:157) at org.elasticsearch.compute.operator.DriverStatus.toXContent(DriverStatus.java:129) at org.elasticsearch.xcontent@9.2.0/org.elasticsearch.xcontent.XContentBuilder.value(XContentBuilder.java:993) at org.elasticsearch.xcontent@9.2.0/org.elasticsearch.xcontent.XContentBuilder.field(XContentBuilder.java:978) at org.elasticsearch.server@9.2.0/org.elasticsearch.tasks.TaskInfo.toXContent(TaskInfo.java:113) at org.elasticsearch.server@9.2.0org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup.toXContent(TaskGroup.java:63) at org.elasticsearch.server@9.2.0/org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup.toXContent(TaskGroup.java:67) at org.elasticsearch.server@9.2.0/org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse.lambda$groupedByParent$10(ListTasksResponse.java:183) ``` Also, this looks like the source of this issue, with another similar case: Fixes elastic#131564
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Manual 8.19 backport of #132260