# Percona Server crashed after upgrade from 5.5 to 5.6

**URL:** <https://forums.percona.com/t/percona-server-crashed-after-upgrade-from-5-5-to-5-6/5901>\
**Category:** Other MySQL® Questions\
**Created:** [September 29, 2017, 2:12pm UTC](https://forums.percona.com/t/percona-server-crashed-after-upgrade-from-5-5-to-5-6/5901 "2017-09-29T14:12:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jiez98](https://avatars.discourse-cdn.com/v4/letter/j/85f322/32.png) [@jiez98](https://forums.percona.com/u/jiez98)\
**Post date:** [September 29, 2017, 2:12pm UTC](https://forums.percona.com/t/percona-server-crashed-after-upgrade-from-5-5-to-5-6/5901/1 "2017-09-29T14:12:12Z")

</div>

We upgrade one of our Percona MySQL 5.5 server to 5.6 a week ago, then it crashed all of sudden with the following error message:  
[09/29/17 01:34 PM] Barnum, Christopher: /datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(my\_print\_stacktrace+0x35)[0x9363a5]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(handle\_fatal\_signal+0x3eb)[0x6816fb]  
/lib64/libpthread.so.0(+0xf7e0)[0x7fade07507e0]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(my\_hash\_first+0x36)[0x921a76]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(my\_hash\_search+0x11)[0x921ad1]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z14get\_slave\_uuidP3THDP6String+0x46)[0x8f42b6]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z16show\_slave\_hostsP3THD+0xa69)[0x8f6529]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z21mysql\_execute\_commandP3THD+0x38ee)[0x70d31e]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z11mysql\_parseP3THDPcjP12Parser\_state+0x609)[0x711849]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z16dispatch\_command19enum\_server\_commandP3THDPcj+0xbc0)[0x712b30]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z10do\_commandP3THD+0x117)[0x714a87]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(\_Z24do\_handle\_one\_connectionP3THD+0x130)[0x6da810]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(handle\_one\_connection+0x45)[0x6da915]  
/datadrive/apollo/\_env/EC2NMDBPerconaClusterServer-swit1na.15655325.302524007.1470144507/bin/mysqld\_real(pfs\_spawn\_thread+0x126)[0xb289f6]  
/lib64/libpthread.so.0(+0x7aa1)[0x7fade0748aa1]  
/lib64/libc.so.6(clone+0x6d)[0x7fade049593d]

Does anyone have any idea why and how to troubleshoot?

Thanks,  
Jie