If the bootstrap file of a custom runtime is a shell script and the following error occurs, you must add this content to the bootstrap file of the custom runtime: #!/bin/bash.

{
  "ErrorCode":"CAExited",
    "ErrorMessage":"The CA process either cannot be started or exited:ContainerStartDuration:25037266905. CA process cannot be started or exited already: rpc error: code = 106 desc = ContainerStartDuration:25000000000. Ping CA failed due to: dial tcp 21.0.7.2:9000: i/o timeout Logs : 2019-11-29T07:27:50.759658265Z panic: standard_init_linux.go:178: exec user process caused \"exec format error\"     
}  

If the bootstrap file is a binary executable file, such as a binary file compiled by using Go or C++, you do not need to add #!/bin/bash.