Thread Pool metrics for DSE getting truncated

[PeterGilroy]

Thread Pool metrics for DSE getting truncated.
Retrieving the metric from http://10.10.10.10:9000/metrics will show:

org_apache_cassandra_metrics_thread_pools_active_tasks{host="d92991be-3582-43c9-bef9-b2e9f1017c6d",instance="10.10.10.10",cluster="maac",datacenter="Cassandra",rack="rack1",pod_name="ip-10-10-10-10",pool_type="internal",pool_name="Repair",} 0.0
org_apache_cassandra_metrics_thread_pools_active_tasks{host="d92991be-3582-43c9-bef9-b2e9f1017c6d",instance="10.10.10.10",cluster="maac",datacenter="Cassandra",rack="rack1",pod_name="ip-10-10-10-10",pool_type="internal",pool_name="TPC",} 0.0

However this would be expected to be Repair-Task instead of Repair and instead of TPC be:

TPC/all/BATCH_REMOVE                               0                       0 (N/A)       N/A          24989       N/A                 0
TPC/all/EVENTLOOP_PROCESSED_TASKS                  0                     N/A (N/A)       N/A       15246816       N/A               N/A
TPC/all/EVENTLOOP_SCHEDULED_TASKS                  0                     N/A (N/A)       N/A       26137492       N/A               N/A
TPC/all/EVENTLOOP_SELECTOR_EVENTS                  0                     N/A (N/A)       N/A        6134785       N/A               N/A
TPC/all/EVENTLOOP_SELECT_CALLS                     1                     N/A (N/A)       N/A        8991407       N/A               N/A
TPC/all/EVENTLOOP_SELECT_NOW_CALLS                 0                     N/A (N/A)       N/A        9002688       N/A               N/A
TPC/all/EVENTLOOP_SPIN                             0                     N/A (N/A)       N/A       80922912       N/A               N/A
TPC/all/EXECUTE_STATEMENT                          0                     N/A (N/A)       N/A             56       N/A               N/A
TPC/all/NODESYNC_VALIDATION                        0                     N/A (N/A)       N/A           5194       N/A               N/A
TPC/all/READ_DISK_ASYNC                            0                     N/A (N/A)       N/A            129       N/A               N/A
TPC/all/READ_INTERNAL                              0                     N/A (N/A)       N/A        1010946       N/A               N/A
TPC/all/READ_RANGE_INTERNAL                        0                     N/A (N/A)       N/A           6984       N/A               N/A
TPC/all/READ_RANGE_LOCAL                           0                       0 (N/A)       N/A              1       N/A                 0
TPC/all/READ_RANGE_RESPONSE                        0                     N/A (N/A)       N/A            210       N/A               N/A
TPC/all/READ_SPECULATE                             0                     N/A (N/A)       N/A              6       N/A               N/A
TPC/all/READ_RESPONSE                              0                     N/A (N/A)       N/A        1062638       N/A               N/A
TPC/all/TIMED_TIMEOUT                              0                     N/A (N/A)       N/A        5218530       N/A               N/A
TPC/all/UNKNOWN                                    0                     N/A (N/A)       N/A              1       N/A               N/A
TPC/all/WRITE_INTERNAL                             0                     N/A (N/A)       N/A          23958       N/A               N/A
TPC/all/WRITE_LOCAL                                0                       0 (N/A)       N/A         262963       N/A                 0
TPC/all/WRITE_REMOTE                               0                       0 (N/A)       N/A          25052       N/A                 0
TPC/all/WRITE_MEMTABLE                             0                     N/A (N/A)       N/A          87315       N/A               N/A
TPC/all/WRITE_RESPONSE                             0                     N/A (N/A)       N/A         536269       N/A               N/A

as per https://docs.datastax.com/en/dse/6.8/managing/tools/nodetool/thread-pool-statistics.html

It appears that the '-' and '/' characters are not being handled correctly and truncating the metric names.

┆Issue is synchronized with this Jira Story by Unito
┆Issue Number: MAPI-87