[MooseFS-Users] Chunk locked, can you help me please! thank you !

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hi，i install MFS2.0 in CentOS6.5_x86-64, yesterday is on error  "pipe error: EMFILE (Too many open files)", i increase the  ulimit=655350, 


now my MFS is on error "file: 1170 fs_writechunk returned status: Chunk locked", i search in google and find no answer.  how can i fix it ?  


thank you very much, forgive my pool english