org.apache.cassandra.service

Interface StartupCheck

public interface StartupCheck

A test to determine if the system is in a valid state to start up. Some implementations may not actually halt startup, but provide information or advice on tuning and non-fatal environmental issues (e.g. like checking for and warning about suboptimal JVM settings). Other checks may indicate that they system is not in a correct state to be started. Examples include inability to load JNA when the cassandra.boot_without_jna option is not set, missing or unaccessible data directories, unreadable sstables and misconfiguration of cluster_name in cassandra.yaml. The StartupChecks class manages a collection of these tests, which it executes right at the beginning of the server settup process.

Method Summary

Modifier and Type	Method and Description
void	execute() Run some test to determine whether the system is safe to be started In the case where a test determines it is not safe to proceed, the test should log a message regarding the reason for the failure and ideally the steps required to remedy the problem.

Method Detail

execute

void execute()
      throws StartupException

Run some test to determine whether the system is safe to be started In the case where a test determines it is not safe to proceed, the test should log a message regarding the reason for the failure and ideally the steps required to remedy the problem.

Throws:

StartupException - if the test determines that the environement or system is not in a safe state to startup