When running the tiered-read-only.wtperf configuration with chunk cache enabled and using a chunk size over 500MB, we crash. Here is the wtperf configuration that reproduces the issue:

 
conn_config="cache_size=2048M,log=(enabled=true),tiered_storage=(bucket=/mnt/wt/db/DB/bucket,bucket_prefix=pfx,local_retention=2,name=dir_store),chunk_cache=(enabled=1,type=FILE,capacity=60GB,chunk_size=512MB,storage_path=/mnt/wt/chunk/CACHE/chunk_cache),verbose=[chunkcache]"
pareto=20
table_config="type=file"
tiered="dir_store"
# checkpoint_threads=1
# checkpoint_interval=30
tiered_flush_interval=40
key_sz=100
value_sz=1024
icount=12000000
run_time=3600
threads=((count=20,reads=1))
warmup=120
sample_interval=5
populate_threads=8
report_interval=5
readonly=true