After a while, the /var filesystem is full because the smbd samba daemon cannot release the space of job files removed:

To release this space I must restart the service or kill -15 the process that already use this file.

This is the situation after some hours of work:

# lsof |grep smbprn. smbd 10099 root 34u REG 253,7 129691 82 /var/spool/samba/smbprn.Y44hEB (deleted)
smbd 10099 root 36u REG 253,7 190666 72 /var/spool/samba/smbprn.Jqx29D (deleted)
smbd 10099 root 38u REG 253,7 461718458 73 /var/spool/samba/smbprn.sY0OzI (deleted)
smbd 10099 root 41u REG 253,7 129347 93 /var/spool/samba/smbprn.i7fjQ6 (deleted)
smbd 10099 root 42u REG 253,7 128170 79 /var/spool/samba/smbprn.gdEDXN (deleted)
smbd 10099 root 45u REG 253,7 229790 80 /var/spool/samba/smbprn.qjm2NL (deleted)
smbd 10099 root 46u REG 253,7 43076 97 /var/spool/samba/smbprn.z0etcZ (deleted)
smbd 10099 root 48u REG 253,7 129339 95 /var/spool/samba/smbprn.GHcowo (deleted)
smbd 10099 root 49u REG 253,7 216893 98 /var/spool/samba/smbprn.2cqa6X (deleted)
smbd 10099 root 52u REG 253,7 130143 87 /var/spool/samba/smbprn.QimHW4 (deleted)
smbd 10099 root 55u REG 253,7 52581 100 /var/spool/samba/smbprn.snvGa3 (deleted)
smbd 10099 root 56u REG 253,7 129623 94 /var/spool/samba/smbprn.w7L8y6 (deleted)
smbd 10099 root 68u REG 253,7 64781 99 /var/spool/samba/smbprn.2uHnut (deleted)
smbd 10099 root 69u REG 253,7 52581 101 /var/spool/samba/smbprn.Exeq3U (deleted)
smbd 10099 root 70u REG 253,7 43681 106 /var/spool/samba/smbprn.REFsbL (deleted)
smbd 10099 root 71u REG 253,7 342598 102 /var/spool/samba/smbprn.8Dka0u (deleted)
smbd 10099 root 72u REG 253,7 222603 104 /var/spool/samba/smbprn.q6ZPY7 (deleted)
smbd 10099 root 73u REG 253,7 221328 109 /var/spool/samba/smbprn.K2YwWA (deleted)
smbd 10099 root 74u REG 253,7 43780 107 /var/spool/samba/smbprn.1o6uIX (deleted)
smbd 10099 root 75u REG 253,7 221019 108 /var/spool/samba/smbprn.KeH0O3 (deleted)
smbd 10099 root 77u REG 253,7 43315 111 /var/spool/samba/smbprn.KBL8ic (deleted)
smbd 10100 root 34u REG 253,7 142770 77 /var/spool/samba/smbprn.s1h496 (deleted)
smbd 10100 root 35u REG 253,7 33696 78 /var/spool/samba/smbprn.GncIKK (deleted)
smbd 10101 root 33u REG 253,7 240900 69 /var/spool/samba/smbprn.3WQlx1 (deleted)
smbd 10101 root 34u REG 253,7 409379 96 /var/spool/samba/smbprn.zZ5RbD (deleted)
smbd 10101 root 35u REG 253,7 162610 67 /var/spool/samba/smbprn.ziDbOl (deleted)
smbd 10101 root 38u REG 253,7 242494 68 /var/spool/samba/smbprn.X0YIZT (deleted)
smbd 10101 root 42u REG 253,7 327729 70 /var/spool/samba/smbprn.ZUwcjE (deleted)
smbd 10101 root 43u REG 253,7 429289 71 /var/spool/samba/smbprn.n5YHhG (deleted)
smbd 11962 nobody 16u REG 253,7 123406 74 /var/spool/samba/smbprn.Wclp0q (deleted)
smbd 11962 nobody 33u REG 253,7 2804169 86 /var/spool/samba/smbprn.BrKhuU (deleted)
smbd 11962 nobody 35u REG 253,7 63284 75 /var/spool/samba/smbprn.Aoq7I2 (deleted)
smbd 11962 nobody 40u REG 253,7 4814097 76 /var/spool/samba/smbprn.ZZy1rS (deleted)
smbd 11962 nobody 41u REG 253,7 82282 88 /var/spool/samba/smbprn.rAIBil (deleted)
smbd 11962 nobody 42u REG 253,7 602346 81 /var/spool/samba/smbprn.4ZTHAL (deleted)
smbd 11962 nobody 44u REG 253,7 28309942 83 /var/spool/samba/smbprn.45x0K9 (deleted)
smbd 11962 nobody 45u REG 253,7 5608461 84 /var/spool/samba/smbprn.bLuZXv (deleted)
smbd 11962 nobody 46u REG 253,7 5603883 85 /var/spool/samba/smbprn.MIA8uL (deleted)
smbd 11962 nobody 47u REG 253,7 129605 103 /var/spool/samba/smbprn.vv4vRt (deleted)
smbd 11962 nobody 48u REG 253,7 82219 115 /var/spool/samba/smbprn.dHbGuR (deleted)
smbd 11962 nobody 49u REG 253,7 65393 89 /var/spool/samba/smbprn.btj79i (deleted)
smbd 11962 nobody 50u REG 253,7 774651 90 /var/spool/samba/smbprn.6bMjov (deleted)
smbd 11962 nobody 51u REG 253,7 873423 91 /var/spool/samba/smbprn.qM3VjY (deleted)

The /var/spool/samba folder is empty, but the smbprn temp file still use the space on filesystem because the file is already open, and after a while i get a filesystem full on /var.

Is this a know issue?
There is some solution?

Many thanks