Examples of com.sleepycat.je.rep.UnknownMasterException

com.sleepycat.je.rep.UnknownMasterException
Indicates that the underlying operation requires communication with a Master, but that a Master was not available.
This exception typically indicates there is a system level problem. It could indicate for example, that a sufficient number of nodes are not available to hold an election and elect a Master, or that this node was having problems with the network and was unable to communicate with other nodes.
The application can choose to retry the operation, potentially logging the problem, until the underlying system level problem has been addressed.


            case REPLICA:
                throw new ReplicaWriteException(locker, event);


            case UNKNOWN:
                throw new UnknownMasterException(locker, event);


            case DETACHED:
                throw new UnknownMasterException(locker, event);


            default:
                throw EnvironmentFailureException.unexpectedState
                    ("Unexpected state: " + nodeState.getRepEnvState());
        }

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                            compareTo(bestResponse.getProposal()) > 0)) {
                    bestResponse = result;
                }
            }
            if (bestResponse == null) {
                throw new UnknownMasterException
                    ("Could not determine master from helpers at:" +
                     learnerSockets.toString());
            }
            return(MasterValue) bestResponse.getValue();
        } finally {

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        ResponseMessage resp = me.getResponseMessage();


        if (resp == null) {
            if (me.getException() != null) {
                throw new UnknownMasterException
                    ("Problem communicating with master.", me.getException());
            }
            /*
             * Returning null on success is part of the message protocol, the
             * caller expects it.

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        if (exitException != null) {
            LoggerUtils.warning(logger, repImpl, "Exiting joinGroup after " +
                                retries + " retries." + exitException);
            throw exitException;
        }
        throw new UnknownMasterException(null, repImpl.getStateChangeEvent());


    }

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                            compareTo(bestResponse.getProposal()) > 0)) {
                    bestResponse = result;
                }
            }
            if (bestResponse == null) {
                throw new UnknownMasterException
                    ("Could not determine master from helpers at:" +
                     learnerSockets.toString());
            }
            return(MasterValue) bestResponse.getValue();
        } finally {

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            case REPLICA:
                throw new ReplicaWriteException(locker, event);


            case UNKNOWN:
                throw new UnknownMasterException(locker, event);


            case DETACHED:
                throw new UnknownMasterException(locker, event);


            default:
                throw EnvironmentFailureException.unexpectedState
                    ("Unexpected state: " + nodeState.getRepEnvState());
        }

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        if (exitException != null) {
            LoggerUtils.warning(logger, repImpl, "Exiting joinGroup after " +
                                retries + " retries." + exitException);
            throw exitException;
        }
        throw new UnknownMasterException(null, repImpl.getStateChangeEvent());
    }

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Related Classes of com.sleepycat.je.rep.UnknownMasterException

com.sleepycat.je.rep.elections.Learner

com.sleepycat.je.rep.impl.node.RepNode

com.sleepycat.je.rep.impl.RepImpl

com.sleepycat.je.rep.util.ReplicationGroupAdmin

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