I just used spark streaming. I have a few questions about checkpoint: There are two types of checkpoint, one for meta for driver and one for data. The manual says that the checkpoint of data will be written only if you use stateful transformation. So...
the data source is kafka, and a field is a timestamp. We want to calculate the difference between the timestamps of the two pieces of data, and then add a new field to store this value and send it out. I checked. Do you want to reducebykeyandwindow? Wit...
error log com.slhan.service.BusinessService the 341 line is to get the value of the broadcast variable 18 09 08 13:50:02 ERROR scheduler.JobScheduler: Error running job streaming job 1536385800000 ms.1 java.io.IOException: com.esotericsoftware.kr...
purpose: there are two large pieces of data in spark that require join,. Both input data contain the field userid. Now you need to associate them according to userid. I hope to avoid shuffle. completed: I pre-processed two pieces of data into 1w f...
1. Json data is now available as follows { "id ": 11, "data ": [{ "package ": "com.browser1 ", "activetime ": 60000}, { "package ": "com.browser6 ", "activetime ": 1205000}, { "package ": "com.browser7 ", "activetime ": 1205000}]} { "id ": 12...
the figure is as follows: def update_model(rdd),mixture_model: it s OK to declare mixture_model directly in update_model, but every time you foreachRDD, you need to re-declare MingleModel. Makes it impossible to update the model in real time ...
returns a list after running a function. The second function uses the list of the first function, but when the list is output, it becomes not a list and cannot be len (). figure: The bin variable is the result of the previous function, and during t...
scene in the company, do the company s project A, use the company s private server. when you are at home, if you want to play with other project B, you should go to setting.xml to change the image setting to a public warehouse . does maven prov...
1. The file structure directory is as follows: index.scss@importscssicon.scssfonts: main.jsindex.scss : ask the great god to help solve it? Compare heart to heart ...
<body> <div>< div> <div>< div> <div>< div> <div>< div> < body> if you bind all the div events under the body and point to the bound div itself, ask the seniors to explain that t...
create an ordinary gwt project, version 2.8.0-rc3 and 2.8.2, and the timer in demo makes rpc polling requests. Memory continues to grow in ie11. The timer stops memory from being freed. Growth knows that the browser is stuck. (the requested data indic...