CI (Buildkite, code coverage): increase the value of JULIA_WORKER_TIMEOUT on the code coverage job

Author: DilumAluthge

.buildkite/pipelines/scheduled/0_webui.yml

@@ -21,4 +21,4 @@ steps:
           # verifies the treehash of the pipeline itself and the inputs listed in `inputs`
           signed_pipelines:
             - pipeline: .buildkite/pipelines/scheduled/coverage/coverage_linux64.yml
-              signature: "U2FsdGVkX1+lpFo/nKzx3c6xCZPKYTAuunXpOsZG4+s4+iU5LfEpMvtNvpKQjDugRoxQxCItMqB6vr4KZN3KtKhjkLbr8ExAyaPil/N/uFhrLlpwNem9dxHbPrU2l7qo"
+              signature: U2FsdGVkX1/SgLuxAxx2mXCmQ0D5YHA53wNyJgx8YE/JXyqXF0KyHiUPB/If9XHBhAwkXIUUlElfW07AWxkue3DVAD2+/iemnsO1w8HxuyyTa3eDQS5+GWqHp9IfRzQW

.buildkite/pipelines/scheduled/coverage/coverage_linux64.yml

@@ -29,6 +29,9 @@ steps:
       git config --global init.defaultBranch master
 
       echo "--- Run Julia tests in parallel with code coverage enabled"
+      export JULIA_NUM_THREADS=1
+      export JULIA_WORKER_TIMEOUT=1200 # 1200 seconds = 20 minutes
+      ./julia -e 'import Distributed; @info "" Distributed.worker_timeout()'
       ./julia --code-coverage=all --sysimage-native-code=no .buildkite/pipelines/scheduled/coverage/run_tests_parallel.jl
 
       echo "--- Process and upload coverage information"