cheisterkamp
commented
7 years ago Note that sometimes the error occurs when the program tries to compute_chips (getting the RGB pngs of the chips). However, if the user individually clicks on each chip in the chip table, the chips go through compute_chips individually rather than in parallel. In this case, the error occurs during the process of computing features.
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[hs] query database
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[mc3] FEAT_UID is different. Need to reload features
[mc3] Old: None
[mc3] New: _FEAT(hesaff+sift,0_9001)_CHIP(sz750)
[hs] unload_cxdata(cx='all')
[hs] Unloading all data
[hs] finished unloading all data
=============================
[cc2] Precomputing chips and loading chip paths: 'test3'
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[cc2] chip_uid = '_CHIP(sz750)'
[parallel] Already computed 1 compute_chip tasks
[parallel] ... No compute_chip tasks left to compute!
[cc2] Done Precomputing chips and loading chip paths
[cc2]=============================
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[fc2] Precomputing and loading features: 'test3'
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[fc2] feat_uid = '_FEAT(hesaff+sift,0_9001)_CHIP(sz750)'
[io] fname='kpts_list_FEAT(hesaff+sift,0_9001)_CHIP(sz750)_cids((1,)d[z^3[m8).npy' does not exist
[io] fname='desc_list_FEAT(hesaff+sift,0_9001)_CHIP(sz750)_cids((1,)d[z^3[m8).npy' does not exist
[fc2] Loading _FEAT(hesaff+sift,0_9001)_CHIP(sz750) individually
[parallel] Already computed 0 precompute_hesaff tasks
tic('Executing 1 precompute_hesaff: tasks in serial')
precompute_hesaff:
precompute_hesaff: 1/1
...toc('Executing 1 precompute_hesaff: tasks in serial')=0.1942s
*** Error in `python': munmap_chunk(): invalid pointer: 0x000000000449fce0 ***
The first time a query is run on a new database with 3 chips, some sort of error occurs in the multiprocessing of precomupte_hesaff (located in the extern_feat file)
============================= The second time you open HotSpotter and try to run a query on the same database, the following error occurs:
If you look at /home/noah/Desktop/attempt9/_hsdb/computed/feats/cid1_FEAT(hesaff+sift,0_9001)_CHIP(sz750).npz the file exists, but is empty. I think that what is happening is that the file is created before the multiprocessing/precompute_hesaff error occurs, but never written to. The second time through the program, it sees that the file exists, so it doesn't try to rerun precompute_hesaff, but is still unable to continue.