offset

问题 How will kafka deal with a call to KafkaConsumer.commitAsync(Map<TopicPartition, OffsetAndMetadata> offsets, OffsetCommitCallback callback) when offset value for a topic is given as a lesser value than a previous invocation? 回答1: It will simply set the offset of the partition to the value you specified,so next time you will consume you message from commitedOffset+1. The javadoc of commitAsync() says: The committed offset should be the next message your application will consume,i.e.

问题 How will kafka deal with a call to KafkaConsumer.commitAsync(Map<TopicPartition, OffsetAndMetadata> offsets, OffsetCommitCallback callback) when offset value for a topic is given as a lesser value than a previous invocation? 回答1: It will simply set the offset of the partition to the value you specified,so next time you will consume you message from commitedOffset+1. The javadoc of commitAsync() says: The committed offset should be the next message your application will consume,i.e.

来源： https://stackoverflow.com/questions/11904766/strange-ordering-bug-is-it-a-bug-when-ordering-two-columns-with-identical-val

来源： https://stackoverflow.com/questions/11904766/strange-ordering-bug-is-it-a-bug-when-ordering-two-columns-with-identical-val

来源： https://stackoverflow.com/questions/31655360/svg-text-anchor-top-left

来源： https://stackoverflow.com/questions/31655360/svg-text-anchor-top-left

问题 We use kafka for our message queue,Our business required that message timestamp must with the same order with the offset, that means: if there are message m1 and message m2, and (m1.timestamp 回答1: It depends on the timestamp type used, there are two types: CreateTime - timestamp is assigned when producer record is created, so before sending. There can be retries, so there is no guarantee that ordering is preserved. LogAppendTime - timestamp is assigned when record is appended to the log on

问题 Consider a computer system with a 32-bit logical address and 4KB page size. The system supports up to 512MB of physical memory. How many entries are there in a conventional single-level page table? Conventional single-level page table: 2^32 / 2^12 (4000) = 2^20 = 1,048,576 Why did I have to divide 2^32 / 2^12 to get the answer? How many entries are there in an inverted page table? An inverted page table needs as many entries as there are page frames in memory. Inverted page table: 2^29 (512mb

问题 What is the best or conventional method to align members inside a structure? Is adding dummy arrays the best solution? I have a struct of double and a triple of double s? struct particle{ double mass; std::tuple<double, double, double> position; } If I have an array of these, the memory will look like this [d][d d d][d][d d d][d][d d d]... The problem is that the distance from the first triple to the second triple is not an integer multiple of sizeof(std::tuple<double, double,double>)==3

问题 This question already has answers here : Fixed page header overlaps in-page anchors (34 answers) Closed 4 years ago . I am trying to clean up the way my anchors work. I have a header that is fixed to the top of the page, so when you link to an anchor elsewhere in the page, the page jumps so the anchor is at the top of the page, leaving the content behind the fixed header (I hope that makes sense). I need a way to offset the anchor by the 25px from the height of the header. I would prefer HTML