Possible reasons for elasticsearch using curl to guide datagram 400

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curl -H 'Content-Type: application/x-ndjson'  -s -XPOST 10.0.3.73:9200/yyzj2019-04/trans/_bulk?pretty --data-binary @../test_6000.txt

Error report

 1 {
 2   "error" : {
 3     "root_cause" : [ {
 4       "type" : "parse_exception",
 5       "reason" : "Failed to derive xcontent"
 6     } ],
 7     "type" : "parse_exception",
 8     "reason" : "Failed to derive xcontent"
 9   },
10   "status" : 400
11 }

Possible causes:

1. Carefully check the IP, port and the file name path after @ in the command

2. Check the encoding format of data file TXT, use UTF-8

3。。。

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