Hi All, In multithreaded/Multicore environment can we use RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF independently, or this flag should always be used with RTE_HASH_EXTRA_FLAGS_MULTI_WRITER_ADD. We are trying to create and access the hash table with RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF only. We are getting crashes in multi core environments , we debugged nothing wrong in the application , everything looks good. We call rte_hash_del_key() first and from the returned position we are calling rte_hash_free_key_with_position(). Please let me know if we missed something. Thanks, Venkatesh.