aeron-archive/src/main/java/io/aeron/archive/client/AeronArchive.java
public String pollForErrorResponse()
    {
        lock.lock();
        try
        {
            ensureOpen();

            if (controlResponsePoller.poll() != 0 && controlResponsePoller.isPollComplete())
            {
                if (controlResponsePoller.controlSessionId() == controlSessionId &&
                    controlResponsePoller.templateId() == ControlResponseDecoder.TEMPLATE_ID &&
                    controlResponsePoller.code() == ControlResponseCode.ERROR)
                {
                    return controlResponsePoller.errorMessage();
                }
            }

            return null;
        }
        finally
        {
            lock.unlock();
        }
    }
public String pollForErrorResponse()
    {
        lock.lock();
        try
        {
            ensureOpen();

            if (controlResponsePoller.poll() != 0 && controlResponsePoller.isPollComplete())
            {
                if (controlResponsePoller.controlSessionId() == controlSessionId &&
                    controlResponsePoller.templateId() == ControlResponseDecoder.TEMPLATE_ID &&
                    controlResponsePoller.code() == ControlResponseCode.ERROR)
                {
                    return controlResponsePoller.errorMessage();
                }
            }

            return null;
        }
        finally
        {
            lock.unlock();
        }
    }
public String pollForErrorResponse ( ) { lock . lock ( ) ; try { ensureOpen ( ) ; if ( controlResponsePoller . poll ( ) != 0 && controlResponsePoller . isPollComplete ( ) ) { if ( controlResponsePoller . controlSessionId ( ) == controlSessionId && controlResponsePoller . templateId ( ) == ControlResponseDecoder . TEMPLATE_ID && controlResponsePoller . code ( ) == ControlResponseCode . ERROR ) { return controlResponsePoller . errorMessage ( ) ; } } return null ; } finally { lock . unlock ( ) ; } }
Poll the response stream once for an error. If another message is present then it will be skipped over
so only call when not expecting another response.

@return the error String otherwise null if no error is found.
Poll the response stream once for an error . If another message is present then it will be skipped over so only call when not expecting another response .