Elasticsearch啓動報錯
1.max virtual memory areas vm.max_map_count
ERROR: [2] bootstrap checks failed
[1]: initial heap size [4294967296] not equal to maximum heap size [8589934592]; this can cause resize pauses and prevents mlockall from locking the entire heap
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
知其然：
登錄root用戶，修改/etc/sysctl.conf配置文件，添加一行vm.max_map_count = 262144，然後sysctl -p
[root@xzyap35 ~]# vi /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
# Controls the default maxmimum size of a mesage queue
kernel.msgmnb = 65536
# Controls the maximum size of a message, in bytes
kernel.msgmax = 65536
# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736
# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 4294967296
net.ipv4.conf.all.accept_redirects=0
vm.max_map_count = 262144
"/etc/sysctl.conf" 44L, 1215C written
[root@xzyap35 ~]# sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.conf.all.accept_redirects = 0
vm.max_map_count = 262144
[root@xzyap35 ~]#
2.initial heap size
ERROR: [1] bootstrap checks failed
[1]: initial heap size [4294967296] not equal to maximum heap size [8589934592]; this can cause resize pauses and prevents mlockall from locking the entire heap
這個報錯原因可能不一樣，我這裏的問題是jvm.options設置內存不一致導致的問題
elasticsearch/config/jvm.options
-Xms8g
-Xmx8g