hycdong opened a new issue #659:
URL: https://github.com/apache/incubator-pegasus/issues/659
## Bug Report
### Pegasus version
Pegasus 2.0.0-write-optim(984936de68188dc9cccccfa6a17f3ad798fe0364)
### Coredump Stack
```
#0 0x00000036a70328a5 in raise () from /lib64/libc.so.6
#1 0x00000036a7034085 in abort () from /lib64/libc.so.6
#2 0x00007f394626010e in dsn_coredump() () at
/home/wutao1/pegasus-release/rdsn/src/core/core/service_api_c.cpp:77
#3 0x00007f39462aad8d in dsn::disk_file::on_write_completed(dsn::aio_task*,
void*, dsn::error_code, unsigned long) ()
at /home/wutao1/pegasus-release/rdsn/src/core/core/disk_engine.cpp:111
#4 0x00007f39462ab5c2 in dsn::disk_engine::complete_io(dsn::aio_task*,
dsn::error_code, unsigned int, int) ()
at /home/wutao1/pegasus-release/rdsn/src/core/core/disk_engine.cpp:338
#5 0x00007f39462fa7f9 in
dsn::tools::native_linux_aio_provider::complete_aio(iocb*, int, int) ()
at
/home/wutao1/pegasus-release/rdsn/src/core/tools/common/native_aio_provider.linux.cpp:146
#6 0x00007f39462fa951 in dsn::tools::native_linux_aio_provider::get_event()
()
at
/home/wutao1/pegasus-release/rdsn/src/core/tools/common/native_aio_provider.linux.cpp:124
#7 0x00007f3943376600 in execute_native_thread_routine ()
at
/home/qinzuoyan/git.xiaomi/pegasus/toolchain/objdir/../gcc-4.8.2/libstdc++-v3/src/c++11/thread.cc:84
#8 0x00000036a7807851 in start_thread () from /lib64/libpthread.so.0
#9 0x00000036a70e811d in clone () from /lib64/libc.so.6
```
### Related log
```
F2020-12-16 11:46:04.969 (1608090364969361715 10ec4) replica.io-thrd.69316:
disk_engine.cpp:114:on_write_completed(): assertion expression: size >=
this_size
F2020-12-16 11:46:04.969 (1608090364969382372 10ec4) replica.io-thrd.69316:
disk_engine.cpp:114:on_write_completed(): written buffer size does not equal to
input buffer's size: 3627 vs 3766
```
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