我正在使用 scroll method批量获取大量事件。我不知道如何正确停止滚动。
我现在正在做的(有效)是检查 TransportError
,它表示滚动尝试失败:
scanResp= es.search(
index="nessus_all",
doc_type="marker",
body={"query": {"match_all": {}}},
search_type="scan",
scroll="10m"
)
scrollId= scanResp['_scroll_id']
while True:
try:
response = es.scroll(scroll_id=scrollId, scroll= "10m")
# process results
except Exception as e:
log.debug("ended scroll: {e}".format(e=e))
break
# we are done with the search
这会在 /var/log/elasticsearch/security.log
中生成错误:
[2015-02-16 09:36:07,110][DEBUG][action.search.type ] [eu4] [2791] Failed to execute query phase
org.elasticsearch.transport.RemoteTransportException: [eu5][inet[/10.81.147.186:9300]][indices:data/read/search[phase/scan/scroll]]
Caused by: org.elasticsearch.search.SearchContextMissingException: No search context found for id [2791]
at org.elasticsearch.search.SearchService.findContext(SearchService.java:502)
at org.elasticsearch.search.SearchService.executeScan(SearchService.java:236)
at org.elasticsearch.search.action.SearchServiceTransportAction$SearchScanScrollTransportHandler.messageReceived(SearchServiceTransportAction.java:939)
at org.elasticsearch.search.action.SearchServiceTransportAction$SearchScanScrollTransportHandler.messageReceived(SearchServiceTransportAction.java:930)
at org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:275)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
而且通常似乎不是正确的方法?
最佳答案
根据Elasticsearch's Scroll documentation (从 5.1 版开始):
Each call to the scroll API returns the next batch of results until there are no more results left to return, ie the hits array is empty.
因此,我认为最好的方法是检查 len(response['hits']['hits'])
。
一个更具体的例子:
response = es.search(
index='index_name',
body=<your query here>,
scroll='10m'
)
scroll_id = response['_scroll_id']
while len(response['hits']['hits']):
response = es.scroll(scroll_id=scroll_id, scroll='10m')
# process results
关于python - 如何正确检查滚动结束?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28537547/