Namenode failover will make empty file?

recently, i met a problem, the time line was below:
2023-10-19 19:22:56,584 client had warn wth SocketTimeoutException,Call From node74-53-35-bdxs.qiyi.hadoop/10.74.53.35 to namenode14-bdxs-g1.qiyi.hadoop:8888 failed on socket timeout exception: java.net.SocketTimeoutException: 60000 millis timeout while waiting for channel to be ready for read.
2023-10-19 19:22:56,588 then faileover: A failover has occurred since the start of call #727 ClientNamenodeProtocolTranslatorPB.create over namenode39-bdxs-g1.qiyi.hadoop/10.71.64.221:8888
i can find when the file a was created by searching for audit log
2023-10-19 19:22:56,598 file a was created
2023-10-19 19:23:24,691 file a was created in the second time

i can see the length of the file a was created in the first time from client log, however when i see the file a was empty after 19:23:24,691, the client has no other message, why the file a become empty?