Examples with DispatcherRetriesExhaustedException com.linkedin.databus.core.DispatcherRetriesExhaustedException used on opensource projects

Example 1 with DispatcherRetriesExhaustedException

use of com.linkedin.databus.core.DispatcherRetriesExhaustedException in project databus by linkedin.

the class GenericDispatcher method doRollback.

protected void doRollback(DispatcherState curState, SCN rollbackScn, boolean checkRetries, boolean regressItr) {
    boolean success = true;
    boolean debugEnabled = _log.isDebugEnabled();
    if (!curState.getStateId().equals(StateId.ROLLBACK)) {
        success = false;
        _log.error("ROLLBACK state is expected by the dispatcher, but the current state is:" + curState.getStateId());
    }
    int retriesLeft = Integer.MAX_VALUE;
    if (checkRetries) {
        retriesLeft = getStatus().getRetriesLeft();
        _log.info("Rolling back the dispatcher to last successful checkpoint. Number of remaining retries for dispatcher to replay events = " + retriesLeft);
        success = success && (retriesLeft > 0);
        if (success) {
            if (0 == getStatus().getRetriesNum())
                getStatus().retryOnError("rollback");
            else
                getStatus().retryOnLastError();
        }
    }
    if (success) {
        Checkpoint lastCp = curState.getLastSuccessfulCheckpoint();
        if ((null != lastCp) || (!regressItr)) {
            ConsumerCallbackResult callbackResult = ConsumerCallbackResult.ERROR;
            try {
                _log.info("Rolling back to SCN : " + rollbackScn);
                callbackResult = getAsyncCallback().onRollback(rollbackScn);
            } catch (RuntimeException e) {
                _log.error("Internal onRollback error: " + e.getMessage(), e);
            }
            success = ConsumerCallbackResult.isSuccess(callbackResult);
            if (success) {
                if (debugEnabled)
                    _log.debug("Rollback consumer callback succeeded");
            } else {
                _log.error("Rollback consumer callback failed");
            }
        }
        if (regressItr) {
            if (null != curState.getLastSuccessfulIterator()) {
                _log.info("Rolled back to last successful checkpoint position in the buffer: " + curState.getLastSuccessfulIterator());
                _currentWindowSizeInBytes = 0;
                curState.switchToReplayDataEvents();
            } else {
                _log.fatal("Unable to rollback, this usually means that the events belonging to the last checkpoint" + " are no longer to be found in the buffer. Please checkpoint more frequently to avoid this. Restarting the client " + "will fix this problem, last checkpoint found: \n" + lastCp);
                curState.switchToClosed();
            }
        }
    } else {
        DispatcherRetriesExhaustedException exp = new DispatcherRetriesExhaustedException();
        _log.info("Invoke onError callback as dispatcher retries have exhausted");
        getAsyncCallback().onError(exp);
        curState.switchToClosed();
    }
}