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Bug #17983

Updated by Ward Vandewege over 2 years ago

<pre> 
 ward@shell:~$ arv-mount --debug --foreground --read-write --collection pirca-4zz18-nsaus8rzkfeh69m keep/ 
 2021-08-06 14:54:54 arvados.arv-mount[1224] DEBUG: arv-mount debugging enabled 
 2021-08-06 14:54:54 arvados.arv-mount[1224] INFO: /usr/bin/arv-mount 2.2.1 started 
 2021-08-06 14:54:54 arvados.arv-mount[1224] INFO: enable write is True 
 2021-08-06 14:54:54 arvados.arvados_fuse[1224] DEBUG: InodeCache touched inode 1 (size 0) (uuid pirca-4zz18-nsaus8rzkfeh69m) total now 0 (1 entries) 
 FUSE library version: 2.9.9 
 unique: 1, opcode: INIT (26), nodeid: 0, insize: 56, pid: 0 
 INIT: 7.27 
 flags=0x003ffffb 
 max_readahead=0x00020000 
    INIT: 7.19 
    flags=0x00000021 
    max_readahead=0x00020000 
    max_write=0x00020000 
    max_background=0 
    congestion_threshold=0 
    unique: 1, success, outsize: 40 
 unique: 2, opcode: GETATTR (3), nodeid: 1, insize: 56, pid: 1299 
    unique: 2, success, outsize: 120 
 unique: 3, opcode: STATFS (17), nodeid: 1, insize: 40, pid: 1299 
    unique: 3, success, outsize: 96 
 unique: 4, opcode: OPENDIR (27), nodeid: 1, insize: 48, pid: 1311 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: arv-mount opendir: inode 1 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: InodeCache touched inode 1 (size 0) (uuid pirca-4zz18-nsaus8rzkfeh69m) total now 0 (1 entries) 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: Updating collection pirca-4zz18-nsaus8rzkfeh69m inode 1 to record version None 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: <arvados_fuse.fusedir.CollectionDirectory object at 0x7fb99c7c2558> manifest_size 116 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: InodeCache touched inode 1 (size 14848) (uuid pirca-4zz18-nsaus8rzkfeh69m) total now 14848 (1 entries) 
    unique: 4, success, outsize: 32 
 unique: 5, opcode: READDIR (28), nodeid: 1, insize: 80, pid: 1311 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: arv-mount readdir: fh 0 off 0 
    unique: 5, success, outsize: 120 
 unique: 6, opcode: LOOKUP (1), nodeid: 1, insize: 55, pid: 1311 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: InodeCache touched inode 1 (size 14848) (uuid pirca-4zz18-nsaus8rzkfeh69m) total now 14848 (1 entries) 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: arv-mount lookup: parent_inode 1 name 'stderr (1).txt' inode 2 
    unique: 6, success, outsize: 144 
 unique: 7, opcode: READDIR (28), nodeid: 1, insize: 80, pid: 1311 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: arv-mount readdir: fh 0 off 3 
    unique: 7, success, outsize: 16 
 unique: 8, opcode: RELEASEDIR (29), nodeid: 1, insize: 64, pid: 0 
 2021-08-06 14:56:08 arvados.arvados_fuse[1224] DEBUG: arv-mount release fh 0 
    unique: 8, success, outsize: 16 
 unique: 9, opcode: LOOKUP (1), nodeid: 1, insize: 49, pid: 1313 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: InodeCache touched inode 1 (size 14848) (uuid pirca-4zz18-nsaus8rzkfeh69m) total now 14848 (1 entries) 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: arv-mount lookup: parent_inode 1 name 'testfile' not found 
    unique: 9, error: -2 (No such file or directory), outsize: 16 
 unique: 10, opcode: CREATE (35), nodeid: 1, insize: 65, pid: 1313 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: arv-mount create: parent_inode 1 'testfile' 100644 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: collection notify add <arvados.collection.Collection object at 0x7fb99c6a4b70> testfile <arvados.arvfile.ArvadosFile object at 0x7fb99c82b048> 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: collection notify mod <arvados.collection.Collection object at 0x7fb99c6a4b70> testfile (<arvados.arvfile.ArvadosFile object at 0x7fb99c82b048>, <arvados.arvfile.ArvadosFile object at 0x7fb99c82b048>) 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: InodeCache touched inode 1 (size 14848) (uuid pirca-4zz18-nsaus8rzkfeh69m) total now 14848 (1 entries) 
    unique: 10, success, outsize: 160 
 unique: 11, opcode: FLUSH (25), nodeid: 3, insize: 64, pid: 1313 
    unique: 11, success, outsize: 16 
 unique: 12, opcode: GETXATTR (22), nodeid: 3, insize: 68, pid: 1313 
    unique: 12, error: -38 (Function not implemented), outsize: 16 
 unique: 13, opcode: WRITE (16), nodeid: 3, insize: 112, pid: 1313 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: arv-mount write 1 0 32 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: collection notify write <arvados.collection.Collection object at 0x7fb99c6a4b70> testfile (<arvados.arvfile.ArvadosFile object at 0x7fb99c82b048>, <arvados.arvfile.ArvadosFile object at 0x7fb99c82b048>) 
    unique: 13, success, outsize: 24 
 unique: 14, opcode: FLUSH (25), nodeid: 3, insize: 64, pid: 1313 
 2021-08-06 14:56:21 arvados.arvados_fuse[1224] DEBUG: collection notify mod <arvados.collection.Collection object at 0x7fb99c6a4b70> testfile (<arvados.arvfile.ArvadosFile object at 0x7fb99c82b048>, <arvados.arvfile.ArvadosFile object at 0x7fb99c82b048>) 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: {'pirca-bi6l4-1cd520a55b71d5a7': {'href': '/keep_services/pirca-bi6l4-1cd520a55b71d5a7', 'kind': 'arvados#keepService', 'etag': '2k0rcryua3dxrzkrar3m1pvyc', 'uuid': 'pirca-bi6l4-1cd520a55b71d5a7', 'owner_uuid': 'pirca-tpzed-000000000000000', 'created_at': '2021-08-02T14:54:54.574032000Z', 'modified_by_client_uuid': None, 'modified_by_user_uuid': 'pirca-tpzed-000000000000000', 'modified_at': '2021-08-02T14:54:54.574032000Z', 'service_host': 'keep0.pirca.arvadosapi.com', 'service_port': 25107, 'service_ssl_flag': False, 'service_type': 'disk', 'read_only': False, '_service_root': 'http://keep0.pirca.arvadosapi.com:25107/'}, 'pirca-bi6l4-629198f41fae2d7c': {'href': '/keep_services/pirca-bi6l4-629198f41fae2d7c', 'kind': 'arvados#keepService', 'etag': '97c5ja2or0op55az5cx3dxaui', 'uuid': 'pirca-bi6l4-629198f41fae2d7c', 'owner_uuid': 'pirca-tpzed-000000000000000', 'created_at': '2021-08-02T14:54:54.574032000Z', 'modified_by_client_uuid': None, 'modified_by_user_uuid': 'pirca-tpzed-000000000000000', 'modified_at': '2021-08-02T14:54:54.574032000Z', 'service_host': 'keep1.pirca.arvadosapi.com', 'service_port': 25107, 'service_ssl_flag': False, 'service_type': 'disk', 'read_only': False, '_service_root': 'http://keep1.pirca.arvadosapi.com:25107/'}} 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: 0837c95a7eebd0844371cda55d082228+32: ['http://keep1.pirca.arvadosapi.com:25107/', 'http://keep0.pirca.arvadosapi.com:25107/'] 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: Pool max threads is 2 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: Request: PUT http://keep1.pirca.arvadosapi.com:25107/0837c95a7eebd0844371cda55d082228 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: Request: PUT http://keep0.pirca.arvadosapi.com:25107/0837c95a7eebd0844371cda55d082228 
 2021-08-06 14:56:21 arvados.keep[1224] INFO: PUT 200: 32 bytes in 147.55630493164062 msec (0.000 MiB/sec) 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: KeepWriterThread <KeepWriterThread(Thread-37, started daemon 140433837463296)> succeeded 0837c95a7eebd0844371cda55d082228+32 http://keep0.pirca.arvadosapi.com:25107/ 
 2021-08-06 14:56:21 arvados.keep[1224] INFO: PUT 200: 32 bytes in 170.5644130706787 msec (0.000 MiB/sec) 
 2021-08-06 14:56:21 arvados.keep[1224] DEBUG: KeepWriterThread <KeepWriterThread(Thread-36, started daemon 140433845856000)> succeeded 0837c95a7eebd0844371cda55d082228+32 http://keep1.pirca.arvadosapi.com:25107/ 


 </pre> 

 The above backtrace was caused by (in a separate shell): 

 <pre> 
 ward@shell:~$ date > keep/testfile 

 </pre> 

 which just hangs. 

 On latest main with collection versioning disabled, the problem is identical (tested on tordo). 

 When the `--disable-event-listening` flag is added to `arv-mount`, the deadlock does not happen. 

 On latest main with collection versioning enabled (e.g. ce8i5), the deadlock is partially masked due to bug #18005. https://dev.arvados.org/issues/18005.

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