kangkaisen opened a new issue #293: BE can't be grayscale upgraded URL: https://github.com/apache/incubator-doris/issues/293 **Describe the bug** BE can't be grayscale upgraded. After I upgraded one BE from 0.8.2.1 to latest version. the query will failed. ``` ERROR 1064 (HY000): Ocurrs time out with specfied time xxx MILLISECONDS or ERROR 1064 (HY000): failed to send batch ``` **To Reproduce** Steps to reproduce the behavior: 1. upgrade one BE from 0.8.2.1 to latest version 2. query **Additional context** The latest BE warning logs: ``` W1109 14:43:35.397363 28981 data_stream_sender.cpp:125] failed to send brpc batch, error=No such method, error_text=[E1002][10.24. 104.124:8060][E1002]Fail to find method=doris.PInternalService/transmit_data ``` The 0.8.2.1 BE warning logs ``` W1109 14:43:37.406872 10384 data_stream_sender.cpp:149] failed to send brpc batch, error=No such method, error_text=[E1002][10.20.93.37:8060][E1002]Fail to find method=palo.PInternalService/transmit_data ```
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