hdfs-mount can't read file again after deletion followed by puting a new one

[liaoyw]

version:

hdfs-mount: lastest
kernel: 4.18.8-1.el7.elrepo.x86_64
fuse-libs-2.9.2-11

how to reproduce it

1. mount hdfs
   /hdfs-mount -root / --logLevel 2 -fuse.debug localhost:8020 /mnt &
2. use hdfs command create file localhost:8020/tmp/x
3. cat /mnt/tmp/x

2019/06/04 14:04:20 FUSE: <- Lookup [ID=0x4 Node=0x2 Uid=0 Gid=0 Pid=512] "x"
2019/06/04 14:04:20 FUSE: -> [ID=0x4] Lookup 0x3 gen=0 valid=1m0s attr={valid=1m0s ino=16468 size=17 mode=-rw-r--r--}
2019/06/04 14:04:20 FUSE: <- Getxattr [ID=0x5 Node=0x3 Uid=0 Gid=0 Pid=512] "security.capability" 24 @0
2019/06/04 14:04:20 FUSE: -> [ID=0x5] Getxattr error=operation not supported
2019/06/04 14:04:20 FUSE: <- Getxattr [ID=0x6 Node=0x3 Uid=0 Gid=0 Pid=512] "security.capability" 24 @0
2019/06/04 14:04:20 FUSE: -> [ID=0x6] Getxattr error=operation not supported
2019/06/04 14:04:20 FUSE: <- Open [ID=0x7 Node=0x3 Uid=0 Gid=0 Pid=512] dir=false fl=OpenReadOnly
INFO: 2019/06/04 14:04:20 Open:  /tmp/x OpenReadOnly
2019/06/04 14:04:20 FUSE: -> [ID=0x7] Open 0x1 fl=0
2019/06/04 14:04:20 FUSE: <- Read [ID=0x8 Node=0x3 Uid=0 Gid=0 Pid=512] 0x1 4096 @0x0 dir=false fl=0 lock=0 ffl=OpenReadOnly
Warning: 2019/06/04 14:04:20 FileHandleReader.go:112: [ /tmp/x ] EOF @ 17
2019/06/04 14:04:20 FUSE: -> [ID=0x8] Read 17
xyz0000000000000
2019/06/04 14:04:20 FUSE: <- Getattr [ID=0x9 Node=0x3 Uid=0 Gid=0 Pid=512] 0x1 fl=GetattrFh
2019/06/04 14:04:20 FUSE: -> [ID=0x9] Getattr valid=1m0s ino=16468 size=17 mode=-rw-r--r--
2019/06/04 14:04:20 FUSE: <- Flush [ID=0xa Node=0x3 Uid=0 Gid=0 Pid=512] 0x1 fl=0x0 lk=0xc153994ee1b5de49
2019/06/04 14:04:20 FUSE: -> [ID=0xa] Flush
2019/06/04 14:04:20 FUSE: <- Release [ID=0xb Node=0x3 Uid=0 Gid=0 Pid=0] 0x1 fl=OpenReadOnly rfl=0 owner=0x0
INFO: 2019/06/04 14:04:20 [ /tmp/x ] ReadStats: holes: 0 , cache hits: 0 , hard seeks: 0
INFO: 2019/06/04 14:04:20 [ /tmp/x ] Close/Read: err= <nil>
2019/06/04 14:04:20 FUSE: -> [ID=0xb] Release

4. delete file use hdfs command
5. cat /mnt/tmp/x

cat /mnt/tmp/x
2019/06/04 14:05:10 FUSE: <- Getxattr [ID=0xf Node=0x3 Uid=0 Gid=0 Pid=514] "security.capability" 24 @0
2019/06/04 14:05:10 FUSE: -> [ID=0xf] Getxattr error=operation not supported
2019/06/04 14:05:10 FUSE: <- Open [ID=0x10 Node=0x3 Uid=0 Gid=0 Pid=514] dir=false fl=OpenReadOnly
INFO: 2019/06/04 14:05:10 Open:  /tmp/x OpenReadOnly
Error: 2019/06/04 14:05:10 FileHandleReader.go:33: [ /tmp/x ] Opening:  open /tmp/x: file does not exist
2019/06/04 14:05:10 FUSE: -> [ID=0x10] Open error=EIO: open /tmp/x: file does not exist
cat: /mnt/tmp/x: Input/output error

6. wait some time(about 1min), cat file again

 cat /mnt/tmp/x
2019/06/04 14:06:12 FUSE: <- Lookup [ID=0x17 Node=0x1 Uid=0 Gid=0 Pid=518] "tmp"
2019/06/04 14:06:12 FUSE: -> [ID=0x17] Lookup 0x2 gen=0 valid=1m0s attr={valid=1m0s ino=16395 size=0 mode=drwxrwxrwx}
2019/06/04 14:06:12 FUSE: <- Lookup [ID=0x18 Node=0x2 Uid=0 Gid=0 Pid=518] "x"
Warning: 2019/06/04 14:06:12 Dir.go:186: stat [x]: stat /tmp/x: file does not existstat /tmp/x: file does not exist
2019/06/04 14:06:12 FUSE: -> [ID=0x18] Lookup error=ENOENT
2019/06/04 14:06:12 FUSE: <- Lookup [ID=0x19 Node=0x2 Uid=0 Gid=0 Pid=518] "x"
2019/06/04 14:06:12 FUSE: <- Forget [ID=0x1a Node=0x3 Uid=0 Gid=0 Pid=0] 1
2019/06/04 14:06:12 FUSE: -> [ID=0x1a] Forget
2019/06/04 14:06:12 FUSE: -> [ID=0x19] Lookup 0x3 gen=1 valid=1m0s attr={valid=1m0s ino=16395 size=0 mode=drwxrwxrwx}
2019/06/04 14:06:12 FUSE: <- Getxattr [ID=0x1b Node=0x3 Uid=0 Gid=0 Pid=518] "security.capability" 24 @0
2019/06/04 14:06:12 FUSE: -> [ID=0x1b] Getxattr error=operation not supported
2019/06/04 14:06:12 FUSE: <- Getxattr [ID=0x1c Node=0x3 Uid=0 Gid=0 Pid=518] "security.capability" 24 @0
2019/06/04 14:06:12 FUSE: -> [ID=0x1c] Getxattr error=operation not supported
2019/06/04 14:06:12 FUSE: <- Open [ID=0x1d Node=0x3 Uid=0 Gid=0 Pid=518] dir=true fl=OpenReadOnly
INFO: 2019/06/04 14:06:12 Open:  /tmp/tmp OpenReadOnly
===> Error: 2019/06/04 14:06:12 FileHandleReader.go:33: [ /tmp/tmp ] Opening:  open /tmp/tmp: file does not exist
===> 2019/06/04 14:06:12 FUSE: -> [ID=0x1d] Open error=EIO: open /tmp/tmp: file does not exist
cat: /mnt/tmp/x: Input/output error

7. put new file using hdfs command
8. cat file still using open /tmp/tmp

 cat /mnt/tmp/x
2019/06/04 14:07:16 FUSE: <- Lookup [ID=0x1e Node=0x1 Uid=0 Gid=0 Pid=519] "tmp"
2019/06/04 14:07:16 FUSE: -> [ID=0x1e] Lookup 0x2 gen=0 valid=1m0s attr={valid=1m0s ino=16395 size=0 mode=drwxrwxrwx}
2019/06/04 14:07:16 FUSE: <- Lookup [ID=0x1f Node=0x2 Uid=0 Gid=0 Pid=519] "x"
Warning: 2019/06/04 14:07:16 Dir.go:186: stat [tmp]: stat /tmp/tmp: file does not existstat /tmp/tmp: file does not exist
2019/06/04 14:07:16 FUSE: -> [ID=0x1f] Lookup error=ENOENT
2019/06/04 14:07:16 FUSE: <- Lookup [ID=0x20 Node=0x2 Uid=0 Gid=0 Pid=519] "x"
2019/06/04 14:07:16 FUSE: <- Forget [ID=0x21 Node=0x3 Uid=0 Gid=0 Pid=0] 1
2019/06/04 14:07:16 FUSE: -> [ID=0x21] Forget
2019/06/04 14:07:16 FUSE: -> [ID=0x20] Lookup 0x3 gen=2 valid=1m0s attr={valid=1m0s ino=16395 size=0 mode=drwxrwxrwx}
2019/06/04 14:07:16 FUSE: <- Getxattr [ID=0x22 Node=0x3 Uid=0 Gid=0 Pid=519] "security.capability" 24 @0
2019/06/04 14:07:16 FUSE: -> [ID=0x22] Getxattr error=operation not supported
2019/06/04 14:07:16 FUSE: <- Getxattr [ID=0x23 Node=0x3 Uid=0 Gid=0 Pid=519] "security.capability" 24 @0
2019/06/04 14:07:16 FUSE: -> [ID=0x23] Getxattr error=operation not supported
2019/06/04 14:07:16 FUSE: <- Open [ID=0x24 Node=0x3 Uid=0 Gid=0 Pid=519] dir=true fl=OpenReadOnly
INFO: 2019/06/04 14:07:16 Open:  /tmp/tmp OpenReadOnly
Error: 2019/06/04 14:07:16 FileHandleReader.go:33: [ /tmp/tmp ] Opening:  open /tmp/tmp: file does not exist
2019/06/04 14:07:16 FUSE: -> [ID=0x24] Open error=EIO: open /tmp/tmp: file does not exist
cat: /mnt/tmp/x: Input/output error

expect

read the right file after put new one