I have been dumping several TBs of data over the last few days. I noticed that my copy operations have been hanging for several hours. My ganesha.log is flooded with the below log. [cache_lru] lru_run :INODE LRU :CRIT :Futility count exceeded. The LRU thread is unable to make progress in reclaiming FDs, will try harder. I turned on full debug logs and I see the following logs. Looks like it is not closing any FDs. 24/10/2019 13:20:50 : epoch 5da91d15 : paplbur04.telecom.tcnz.net : ganesha.nfsd-101379[cache_lru] lru_run :INODE LRU :F_DBG :LRU awakes. 24/10/2019 13:20:50 : epoch 5da91d15 : paplbur04.telecom.tcnz.net : ganesha.nfsd-101379[cache_lru] lru_run :INODE LRU :F_DBG :lru entries: 51444 24/10/2019 13:20:50 : epoch 5da91d15 : paplbur04.telecom.tcnz.net : ganesha.nfsd-101379[cache_lru] lru_run :INODE LRU :DEBUG :Open FDs over high water mark, reapring aggressively. 24/10/2019 13:20:50 : epoch 5da91d15 : paplbur04.telecom.tcnz.net : ganesha.nfsd-101379[chunk_lru] chunk_lru_run :INODE LRU :F_DBG :LRU awakes, lru chunks used: 337 24/10/2019 13:20:50 : epoch 5da91d15 : paplbur04.telecom.tcnz.net : ganesha.nfsd-101379[cache_lru] lru_run :INODE LRU :DEBUG :Reaping up to 50 entries from lane 0 . . . . 24/10/2019 13:20:50 : epoch 5da91d15 : paplbur04.telecom.tcnz.net : ganesha.nfsd-101379[cache_lru] lru_run_lane :INODE LRU :DEBUG :Actually processed 50 entries on lane 0 closing 0 descriptors I checked the source code and looks like FD is not closed because of this block. What could cause this ref-count to go above 2? This is my own FSAL. Could the FSAL be not decreasing the ref-count? I dont seem to have this problem with NFSv4. FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c /* check refcnt in range */ if (unlikely(refcnt > 2)) { /* This unref is ok to be done without a valid op_ctx * because we always map a new entry to an export before * we could possibly release references in * mdcache_new_entry. */ QUNLOCK(qlane); mdcache_lru_unref(entry); goto next_lru; } I can attach the full log file in the next email if required. I don't have logs at the full-debug level when it was working fine.