File descriptor leak in views with reduce

I ran df and du on that server and noticed similar figures (full console log at the end of this email). du reports 68GB on /var/opt/couchbase, whereas df reports ~140GB of disk usage. The lsof command shows that there are several files which have been deleted but are still opened by beam.smp. Those files are in /var/opt/couchbase/.delete/, and their total size amounts to the “Other Data” (roughly 70GB).

I’ve never noticed that before, yet recently we started playing with CB views. I wonder if that can be related. Also note that at the time I did the investigation, there had been no activity on the cluster for several hours: no get/set on the buckets, and no compaction or indexing was ongoing.
Are you aware of this problem? What can we do about it?

beam.smp 55872 couchbase 19u REG 8,17 16136013537 4849671 /var/opt/couchbase/.delete/babe701b000ce862e58ca2edd1b8098b (deleted)
beam.smp 55872 couchbase 34u REG 8,17 1029765807 4849668 /var/opt/couchbase/.delete/5c6df85a423263523471f6e20d82ce07 (deleted)
beam.smp 55872 couchbase 51u REG 8,17 1063802330 4849728 /var/opt/couchbase/.delete/c2a11ea6f3e70f8d222ceae9ed482b13 (deleted)
beam.smp 55872 couchbase 55u REG 8,17 403075242 4849667 /var/opt/couchbase/.delete/6af0b53325bf4f2cd1df34b476ee4bb6 (deleted)
beam.smp 55872 couchbase 56r REG 8,17 403075242 4849667 /var/opt/couchbase/.delete/6af0b53325bf4f2cd1df34b476ee4bb6 (deleted)
beam.smp 55872 couchbase 57u REG 8,17 861075170 4849666 /var/opt/couchbase/.delete/72a08b8a613198cd3a340ae15690b7f1 (deleted)
beam.smp 55872 couchbase 58r REG 8,17 861075170 4849666 /var/opt/couchbase/.delete/72a08b8a613198cd3a340ae15690b7f1 (deleted)
beam.smp 55872 couchbase 59r REG 8,17 1029765807 4849668 /var/opt/couchbase/.delete/5c6df85a423263523471f6e20d82ce07 (deleted)
beam.smp 55872 couchbase 60r REG 8,17 896931996 4849672 /var/opt/couchbase/.delete/3b1b7aae4af60e9e720ad0f0d3c0182c (deleted)
beam.smp 55872 couchbase 63r REG 8,17 976476432 4849766 /var/opt/couchbase/.delete/6f5736b1ed9ba232084ee7f0aa5bd011 (deleted)
beam.smp 55872 couchbase 66u REG 8,17 18656904860 4849675 /var/opt/couchbase/.delete/fcaf4193727374b471c990a017a20800 (deleted)
beam.smp 55872 couchbase 67u REG 8,17 662227221 4849726 /var/opt/couchbase/.delete/4e7bbc192f20def5d99447b431591076 (deleted)
beam.smp 55872 couchbase 70u REG 8,17 896931996 4849672 /var/opt/couchbase/.delete/3b1b7aae4af60e9e720ad0f0d3c0182c (deleted)
beam.smp 55872 couchbase 74r REG 8,17 662227221 4849726 /var/opt/couchbase/.delete/4e7bbc192f20def5d99447b431591076 (deleted)
beam.smp 55872 couchbase 75u REG 8,17 1896522981 4849670 /var/opt/couchbase/.delete/3ce0c5999854691fe8e3dacc39fa20dd (deleted)
beam.smp 55872 couchbase 81u REG 8,17 976476432 4849766 /var/opt/couchbase/.delete/6f5736b1ed9ba232084ee7f0aa5bd011 (deleted)
beam.smp 55872 couchbase 82r REG 8,17 1063802330 4849728 /var/opt/couchbase/.delete/c2a11ea6f3e70f8d222ceae9ed482b13 (deleted)
beam.smp 55872 couchbase 83u REG 8,17 1263063280 4849673 /var/opt/couchbase/.delete/e06facd62f73b20505d2fdeab5f66faa (deleted)
beam.smp 55872 couchbase 85u REG 8,17 1000218613 4849767 /var/opt/couchbase/.delete/0c4fb6d5cd7d65a4bae915a4626ccc2b (deleted)
beam.smp 55872 couchbase 87r REG 8,17 1000218613 4849767 /var/opt/couchbase/.delete/0c4fb6d5cd7d65a4bae915a4626ccc2b (deleted)
beam.smp 55872 couchbase 90u REG 8,17 830450260 4849841 /var/opt/couchbase/.delete/7ac46b314e4e30f81cdf0cd664bb174a (deleted)
beam.smp 55872 couchbase 95r REG 8,17 1263063280 4849673 /var/opt/couchbase/.delete/e06facd62f73b20505d2fdeab5f66faa (deleted)
beam.smp 55872 couchbase 96r REG 8,17 1896522981 4849670 /var/opt/couchbase/.delete/3ce0c5999854691fe8e3dacc39fa20dd (deleted)
beam.smp 55872 couchbase 97u REG 8,17 1400132620 4849719 /var/opt/couchbase/.delete/e8eaade7b2ee5ba7a3115f712eba623e (deleted)
beam.smp 55872 couchbase 103r REG 8,17 16136013537 4849671 /var/opt/couchbase/.delete/babe701b000ce862e58ca2edd1b8098b (deleted)
beam.smp 55872 couchbase 104u REG 8,17 1254021993 4849695 /var/opt/couchbase/.delete/f77992cdae28194411b825fa52c560cd (deleted)
beam.smp 55872 couchbase 105r REG 8,17 1254021993 4849695 /var/opt/couchbase/.delete/f77992cdae28194411b825fa52c560cd (deleted)
beam.smp 55872 couchbase 106r REG 8,17 1400132620 4849719 /var/opt/couchbase/.delete/e8eaade7b2ee5ba7a3115f712eba623e (deleted)
beam.smp 55872 couchbase 108u REG 8,17 1371453421 4849793 /var/opt/couchbase/.delete/9b8b199920075102e52742c49233c57c (deleted)
beam.smp 55872 couchbase 109r REG 8,17 1371453421 4849793 /var/opt/couchbase/.delete/9b8b199920075102e52742c49233c57c (deleted)
beam.smp 55872 couchbase 111r REG 8,17 18656904860 4849675 /var/opt/couchbase/.delete/fcaf4193727374b471c990a017a20800 (deleted)
beam.smp 55872 couchbase 115u REG 8,17 16442158432 4849708 /var/opt/couchbase/.delete/2b70b084bd9d0a1790de9b3ee6c78f69 (deleted)
beam.smp 55872 couchbase 116r REG 8,17 16442158432 4849708 /var/opt/couchbase/.delete/2b70b084bd9d0a1790de9b3ee6c78f69 (deleted)
beam.smp 55872 couchbase 151r REG 8,17 830450260 4849841 /var/opt/couchbase/.delete/7ac46b314e4e30f81cdf0cd664bb174a (deleted)
beam.smp 55872 couchbase 181u REG 8,17 770014022 4849751 /var/opt/couchbase/.delete/d35ac74521ae4c1d455c60240e1c41e1 (deleted)
beam.smp 55872 couchbase 182r REG 8,17 770014022 4849751 /var/opt/couchbase/.delete/d35ac74521ae4c1d455c60240e1c41e1 (deleted)
beam.smp 55872 couchbase 184u REG 8,17 775017865 4849786 /var/opt/couchbase/.delete/2a85b841a373ee149290b0ec906aae55 (deleted)
beam.smp 55872 couchbase 185r REG 8,17 775017865 4849786 /var/opt/couchbase/.delete/2a85b841a373ee149290b0ec906aae55 (deleted)