Kafka data loss if connectivity breaks down

Clients Non-Java Clients
1

Hello,

We are facing issue in Kafka messages streaming if connectivity break down.
Data is getting lost if connectivity break down or broker is not available.

2

we are using producer on one server ‘x’ and consumer on other server says ‘y’.We stopped kafka service on consumer ‘y’.We are sending data from x to y . Few messages are visible after starting kafka on ‘‘y’’ other messages or data is getting lost.
We have added below properties as:
if (rd_kafka_conf_set(conf, “enable.idempotence”, “true”, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
TRACE_SHOW(errstr);
}
if (rd_kafka_conf_set(conf, “message.send.max.retries”, “200”, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
TRACE_SHOW(errstr);
}
if (rd_kafka_conf_set(conf, “retry-backoff-ms”, “2000”, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
TRACE_SHOW(errstr);
}
if (rd_kafka_conf_set(conf, “delivery.timeout.ms”, “150000”, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
TRACE_SHOW(errstr);
}
if (rd_kafka_conf_set(conf, “acks”, “all”, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
TRACE_SHOW(errstr);
}
if (rd_kafka_conf_set(conf, “max.in.flight.requests.per.connection”, “1”, errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)
{
TRACE_SHOW(errstr);
}

But getting errstr=No such configuration property: “delivery.timeout.ms” for each property.
Please suggest how can we reloved it.
We have checked version with below api:
rd_kafka_version_str()
kafka version:0.11.6