You need to sychronize or guard your access to the TreeMap or switch to ConcurrentMap. Multiple threads have concurrently modified your tree map, creating a cycle in the tree map. When your code accesses the tree map again it get stuck in a cycle. Read more about the problem in these 3 great articles:

• https://josephmate.github.io/2025-02-26-3200p-cpu-util/
• https://ivoanjo.me/blog/2018/07/21/writing-to-a-java-treemap-concurrently-can-lead-to-an-infinite-loop-during-reads/
• https://access.redhat.com/solutions/58008