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Process barriers prevent a broker from starting database processes (TEs and SMs) until specific conditions are met. Shortly after a broker is started, you may see messages in the log, or in response to requests to start processes, indicating that either the
ProcessReconnect barrier or the
DSMResync barrier prevented process start. Both barriers are safety measures that prevent a broker from starting processes when it should not. In a healthy system, simply waiting will let the barriers complete and allow processes to start.
The default behavior is that the
processStartWaitBarrier host property (specified in the
default.properties file) enables the
ProcessReconnect barrier and the
DSMResync barrier for all databases.
See the following topics: