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https://issues.apache.org/jira/browse/KAFKA-9136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
zhangzhisheng updated KAFKA-9136:
---------------------------------
Description:
for example，i have two topics，one_topic、two_topic，each topic have two
partitions，consumer group 'c_group' subscribe this topics ; how to get c_group
latest commited timestamp?
{code:java}
public static long lastCommitTimestamp(String groupId, String bootstrapServers)
{
int partition = Math.abs(groupId.hashCode() % 50);
TopicPartition tp = new TopicPartition("__consumer_offsets", partition);
Properties props = new Properties();
props.put("bootstrap.servers", bootstrapServers);
props.put("group.id", groupId);
props.put("enable.auto.commit", "false");
props.put("key.deserializer",
"org.apache.kafka.common.serialization.ByteArrayDeserializer");
props.put("value.deserializer",
"org.apache.kafka.common.serialization.ByteArrayDeserializer");
try (KafkaConsumer<byte[], byte[]> consumer = new KafkaConsumer<>(props)) {
consumer.assign(Arrays.asList(tp));
consumer.seekToEnd(Collections.singletonList(tp));
ConsumerRecords<byte[], byte[]> records =
consumer.poll(Duration.ofSeconds(30));
if (records.count() == 0) {
return -1;
}
for (ConsumerRecord<byte[], byte[]> record : records) {
BaseKey baseKey =
GroupMetadataManager.readMessageKey(ByteBuffer.wrap(record.key()));
if(baseKey instanceof OffsetKey){
OffsetKey offsetKey = (OffsetKey) baseKey;
if("one_topic".equals(offsetKey.key().topicPartition().topic())) {
OffsetAndMetadata offsetAndMetadata =
GroupMetadataManager.readOffsetMessageValue(ByteBuffer.wrap(record.value()));
long commitTimestamp = offsetAndMetadata.commitTimestamp();
//why commitTimestamp is current timestamp
}
}
}{code}
return records.iterator().next().timestamp();
}
}
was:for example，i have two topics，one_topic、two_topic，each topic have two
partitions，consumer group 'c_group' subscribe this topics ; how to get c_group
latest commited timestamp?
> get consumer latest commited timestamp
> ---------------------------------------
>
> Key: KAFKA-9136
> URL: https://issues.apache.org/jira/browse/KAFKA-9136
> Project: Kafka
> Issue Type: Wish
> Components: consumer
> Affects Versions: 2.3.0
> Reporter: zhangzhisheng
> Priority: Major
>
> for example，i have two topics，one_topic、two_topic，each topic have two
> partitions，consumer group 'c_group' subscribe this topics ; how to get
> c_group latest commited timestamp?
> {code:java}
> public static long lastCommitTimestamp(String groupId, String
> bootstrapServers) {
> int partition = Math.abs(groupId.hashCode() % 50);
> TopicPartition tp = new TopicPartition("__consumer_offsets", partition);
> Properties props = new Properties();
> props.put("bootstrap.servers", bootstrapServers);
> props.put("group.id", groupId);
> props.put("enable.auto.commit", "false");
> props.put("key.deserializer",
> "org.apache.kafka.common.serialization.ByteArrayDeserializer");
> props.put("value.deserializer",
> "org.apache.kafka.common.serialization.ByteArrayDeserializer");
> try (KafkaConsumer<byte[], byte[]> consumer = new KafkaConsumer<>(props)) {
> consumer.assign(Arrays.asList(tp));
> consumer.seekToEnd(Collections.singletonList(tp));
> ConsumerRecords<byte[], byte[]> records =
> consumer.poll(Duration.ofSeconds(30));
> if (records.count() == 0) {
> return -1;
> }
> for (ConsumerRecord<byte[], byte[]> record : records) {
> BaseKey baseKey =
> GroupMetadataManager.readMessageKey(ByteBuffer.wrap(record.key()));
> if(baseKey instanceof OffsetKey){
> OffsetKey offsetKey = (OffsetKey) baseKey;
> if("one_topic".equals(offsetKey.key().topicPartition().topic())) {
> OffsetAndMetadata offsetAndMetadata =
> GroupMetadataManager.readOffsetMessageValue(ByteBuffer.wrap(record.value()));
> long commitTimestamp = offsetAndMetadata.commitTimestamp();
> //why commitTimestamp is current timestamp
> }
> }
> }{code}
> return records.iterator().next().timestamp();
> }
> }
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