# Kafka input **URL:** \ **Category:** Logstash\ **Created:** [April 23, 2019, 9:39am UTC](https://discuss.elastic.co/t/kafka-input/177998 "2019-04-23T09:39:39Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Masdi](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@Masdi](https://discuss.elastic.co/u/Masdi)\ **Post date:** [April 23, 2019, 9:39am UTC](https://discuss.elastic.co/t/kafka-input/177998/1 "2019-04-23T09:39:39Z")
Hi, I have configured an ELK pipeline and setup kafka as an input in my logstash configuration: input { kafka { bootstrap\_servers =\> "127.0.0.1:9092" topics =\> "applog" } } filter { grok { match =\> { "message" =\> "[%{TIMESTAMP\_ISO8601:mydate}][%{DATA:loglevel}][%{DATA:component\_name}][%{DATA:inst\_id}][%{DATA:class}]?: %{GREEDYDATA:log\_message}" } } date { match =\> ["mydate", "YYYY-MM-dd HH:mm:ss,SSS","ISO8601"] target=\>"@timestamp" } } output { elasticsearch { hosts =\> localhost } } Here is what I get in my terminal when I add a stdout output: [2019-04-23T09:26:35,626][INFO][org.apache.kafka.clients.consumer.ConsumerConfig] ConsumerConfig values: auto.commit.interval.ms = 5000 auto.offset.reset = latest bootstrap.servers = [127.0.0.1:9092] check.crcs = true client.dns.lookup = default client.id = logstash-0 connections.max.idle.ms = 540000 default.api.timeout.ms = 60000 enable.auto.commit = true exclude.internal.topics = true fetch.max.bytes = 52428800 fetch.max.wait.ms = 500 fetch.min.bytes = 1 group.id = logstash heartbeat.interval.ms = 3000 interceptor.classes = internal.leave.group.on.close = true isolation.level = read\_uncommitted key.deserializer = class org.apache.kafka.common.serialization.StringDeserializer max.partition.fetch.bytes = 1048576 max.poll.interval.ms = 300000 max.poll.records = 500 metadata.max.age.ms = 300000 metric.reporters = metrics.num.samples = 2 metrics.recording.level = INFO metrics.sample.window.ms = 30000 partition.assignment.strategy = [class org.apache.kafka.clients.consumer.RangeAssignor] receive.buffer.bytes = 65536 reconnect.backoff.max.ms = 1000 reconnect.backoff.ms = 50 request.timeout.ms = 30000 retry.backoff.ms = 100 sasl.client.callback.handler.class = null sasl.jaas.config = null sasl.kerberos.kinit.cmd = /usr/bin/kinit sasl.kerberos.min.time.before.relogin = 60000 sasl.kerberos.service.name = null sasl.kerberos.ticket.renew.jitter = 0.05 sasl.kerberos.ticket.renew.window.factor = 0.8 sasl.login.callback.handler.class = null sasl.login.class = null sasl.login.refresh.buffer.seconds = 300 sasl.login.refresh.min.period.seconds = 60 sasl.login.refresh.window.factor = 0.8 sasl.login.refresh.window.jitter = 0.05 sasl.mechanism = GSSAPI security.protocol = PLAINTEXT send.buffer.bytes = 131072 session.timeout.ms = 10000 ssl.cipher.suites = null ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1] ssl.endpoint.identification.algorithm = https ssl.key.password = null ssl.keymanager.algorithm = SunX509 ssl.keystore.location = null ssl.keystore.password = null ssl.keystore.type = JKS ssl.protocol = TLS ssl.provider = null ssl.secure.random.implementation = null ssl.trustmanager.algorithm = PKIX ssl.truststore.location = null ssl.truststore.password = null ssl.truststore.type = JKS value.deserializer = class org.apache.kafka.common.serialization.StringDeserializer [2019-04-23T09:26:35,796][INFO][org.apache.kafka.common.utils.AppInfoParser] Kafka version : 2.1.0 [2019-04-23T09:26:35,796][INFO][org.apache.kafka.common.utils.AppInfoParser] Kafka commitId : eec43959745f444f [2019-04-23T09:26:36,165][INFO][org.apache.kafka.clients.Metadata] Cluster ID: RKMed7wBSiqyv3uibNz\_Xw [2019-04-23T09:26:36,174][INFO][org.apache.kafka.clients.consumer.internals.AbstractCoordinator] [Consumer clientId=logstash-0, groupId=logstash] Discovered group coordinator 127.0.0.1:9092 (id: 2147483647 rack: null) [2019-04-23T09:26:36,183][INFO][org.apache.kafka.clients.consumer.internals.ConsumerCoordinator] [Consumer clientId=logstash-0, groupId=logstash] Revoking previously assigned partitions [2019-04-23T09:26:36,184][INFO][org.apache.kafka.clients.consumer.internals.AbstractCoordinator] [Consumer clientId=logstash-0, groupId=logstash] (Re-)joining group [2019-04-23T09:26:36,327][INFO][logstash.agent] Successfully started Logstash API endpoint {:port=\>9601} [2019-04-23T09:26:37,209][INFO][org.apache.kafka.clients.consumer.internals.AbstractCoordinator] [Consumer clientId=logstash-0, groupId=logstash] Successfully joined group with generation 11 [2019-04-23T09:26:37,212][INFO][org.apache.kafka.clients.consumer.internals.ConsumerCoordinator] [Consumer clientId=logstash-0, groupId=logstash] Setting newly assigned partitions [applog-0] When I go to the elasticsearch index management in Kibana, it has been created but with 0 documents: ![Capture](https://us1.discourse-cdn.com/elastic/original/3X/3/3/3310399f5031e43e07cc2a42e6be035f22c97e98.png) I have 138 messages in my partition of my kafka topic. When I try manually by replacing the kafka input by stdin, it works fine. I can't figure out what the problem is. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 21, 2019, 9:39am UTC](https://discuss.elastic.co/t/kafka-input/177998/2 "2019-05-21T09:39:48Z")
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