throwing an instance of 'dmlc::Error

terminate called after throwing an instance of 'dmlc::Error'
what(): [16:41:36] src/van.cc:229: Check failed: obj timeout (5 sec) to wait App 0 customer 0 ready at 0

terminate called after throwing an instance of 'dmlc::Error'
what(): [16:41:36] src/van.cc:229: Check failed: obj timeout (5 sec) to wait App 0 customer 0 ready at 0

Stack trace returned 7 entries:
[bt] (0) ./ps_test() [0x409add]
[bt] (1) ./ps_test() [0x40a3bb]
[bt] (2) ./ps_test() [0x42668f]
[bt] (3) ./ps_test() [0x4291f3]
[bt] (4) /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xb8c80) [0x7fedfb86fc80]
[bt] (5) /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba) [0x7fedfbb406ba]
[bt] (6) /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d) [0x7fedfafd541d]

is timeout too small?