Answer
Uncheckpointable operations like ptrace, inotify, special FDs, or kernel mismatches cause failure.
Quick Answer
CRIU fails when containers use kernel features it can't serialize: open network connections (TCP state is hard to migrate), GPU memory, kernel objects without CRIU support, or processes with kernel threads. Some syscalls are non-restartable. Containers using host networking or --privileged are also problematic for CRIU.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ