我有一个使用@ KafkaListener配置的Kafka使用者（春季启动）。该程序正在生产中运行，一切都很好，直到作为维护的一部分，代理重新启动为止。根据文档，我期望代理备份后，kafka侦听器将恢复。但是，这不是我从日志中观察到的。日志因以下异常而停止：
2020-04-22 11:11:28,802|INFO|automator-consumer-app-id-0-C-1|org.apache.kafka.clients.FetchSessionHandler|[Consumer clientId=automator-consumer-app-id-0, groupId=automator-consumer-app-id] Node 10 was unable to process the fetch request with (sessionId=2138208872, epoch=348): FETCH_SESSION_ID_NOT_FOUND.
2020-04-22 11:24:23,798|INFO|automator-consumer-app-id-0-C-1|org.apache.kafka.clients.FetchSessionHandler|[Consumer clientId=automator-consumer-app-id-0, groupId=automator-consumer-app-id] Error sending fetch request (sessionId=499459047, epoch=314160) to node 7: org.apache.kafka.common.errors.DisconnectException.
2020-04-22 11:36:37,241|INFO|automator-consumer-app-id-0-C 1|org.apache.kafka.clients.FetchSessionHandler|[Consumer clientId=automator-consumer-app-id-0, groupId=automator-consumer-app-id] Error sending fetch request (sessionId=2033512553, epoch=342949) to node 4: org.apache.kafka.common.errors.DisconnectException.
重新启动应用程序后，连接重新建立。我想知道这是否与下面的任何使用者配置有关。
2020-04-22 12:46:59,681|INFO|main|org.apache.kafka.clients.consumer.ConsumerConfig|ConsumerConfig values:
allow.auto.create.topics = true
auto.commit.interval.ms = 5000
auto.offset.reset = latest
bootstrap.servers = [msk-e00-br1.int.bell.ca:9092]
check.crcs = true
client.dns.lookup = default
client.id = automator-consumer-app-id-0
client.rack =
connections.max.idle.ms = 540000
default.api.timeout.ms = 60000
enable.auto.commit = false
exclude.internal.topics = true
fetch.max.bytes = 52428800
fetch.max.wait.ms = 500
fetch.min.bytes = 1
group.id = automator-consumer-app-id
group.instance.id = null
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
增加值
max.incremental.fetch.session.cache.slots
。默认值为1K。您可以在此处参考答案：How to check the actual number of incremental fetch session cache slots used in Kafka cluster?