Merge pull request #17431 from joehillen/issue/17430

Set MAX_OPEN_FILES to 65536

distribution/deb/src/main/packaging/init.d/elasticsearch

@@ -60,7 +60,7 @@ ES_HOME=/usr/share/$NAME
 #ES_JAVA_OPTS=
 
 # Maximum number of open files
-MAX_OPEN_FILES=65535
+MAX_OPEN_FILES=65536
 
 # Maximum amount of locked memory
 #MAX_LOCKED_MEMORY=

distribution/rpm/src/main/packaging/init.d/elasticsearch

@@ -35,7 +35,7 @@ fi
 ES_USER="elasticsearch"
 ES_GROUP="elasticsearch"
 ES_HOME="/usr/share/elasticsearch"
-MAX_OPEN_FILES=65535
+MAX_OPEN_FILES=65536
 MAX_MAP_COUNT=262144
 LOG_DIR="/var/log/elasticsearch"
 DATA_DIR="/var/lib/elasticsearch"

distribution/src/main/packaging/env/elasticsearch

@@ -60,7 +60,7 @@ ES_STARTUP_SLEEP_TIME=5
 # Specifies the maximum file descriptor number that can be opened by this process
 # When using Systemd, this setting is ignored and the LimitNOFILE defined in
 # /usr/lib/systemd/system/elasticsearch.service takes precedence
-#MAX_OPEN_FILES=65535
+#MAX_OPEN_FILES=65536
 
 # The maximum number of bytes of memory that may be locked into RAM
 # Set to "unlimited" if you use the 'bootstrap.mlockall: true' option

distribution/src/main/packaging/systemd/elasticsearch.service

@@ -29,7 +29,7 @@ StandardOutput=journal
 StandardError=inherit
 
 # Specifies the maximum file descriptor number that can be opened by this process
-LimitNOFILE=65535
+LimitNOFILE=65536
 
 # Specifies the maximum number of bytes of memory that may be locked into RAM
 # Set to "infinity" if you use the 'bootstrap.mlockall: true' option

docs/reference/setup/as-a-service.asciidoc

@@ -16,7 +16,7 @@ Each package features a configuration file, which allows you to set the followin
 `ES_HEAP_SIZE`::          The heap size to start with
 `ES_HEAP_NEWSIZE`::       The size of the new generation heap
 `ES_DIRECT_SIZE`::        The maximum size of the direct memory
-`MAX_OPEN_FILES`::        Maximum number of open files, defaults to `65535`
+`MAX_OPEN_FILES`::        Maximum number of open files, defaults to `65536`
 `MAX_LOCKED_MEMORY`::     Maximum locked memory size. Set to "unlimited" if you use the bootstrap.mlockall option in elasticsearch.yml. You must also set ES_HEAP_SIZE.
 `MAX_MAP_COUNT`::         Maximum number of memory map areas a process may have. If you use `mmapfs` as index store type, make sure this is set to a high value. For more information, check the https://github.com/torvalds/linux/blob/master/Documentation/sysctl/vm.txt[linux kernel documentation] about `max_map_count`. This is set via `sysctl` before starting elasticsearch. Defaults to `65535`
 `LOG_DIR`::               Log directory, defaults to `/var/log/elasticsearch`