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Advanced Configuration Properties

Hazelcast has advanced configuration properties. You can set them as property name and value pairs through declarative configuration, programmatic configuration, or JVM system property.

Declarative Configuration

<hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config
    http://www.hazelcast.com/schema/config/hazelcast-config-3.0.xsd"
    xmlns="http://www.hazelcast.com/schema/config"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  ....
  <properties>
    <property name="hazelcast.property.foo">value</property>
    ....
  </properties>
</hazelcast>

Programmatic Configuration

Config config = new Config() ;
config.setProperty( "hazelcast.property.foo", "value" );

System Property

  1. Using JVM parameter: java -Dhazelcast.property.foo=value

  2. Using System class: System.setProperty( "hazelcast.property.foo", "value" );

The table below lists the advanced configuration properties with their descriptions.

Property Name Default Value Type Description
hazelcast.health.monitoring.level SILENT string Health monitoring log level. When SILENT, logs are printed only when values exceed some predefined threshold. When NOISY, logs are always printed periodically. Set to OFF to turn off completely.
hazelcast.health.monitoring.delay.seconds 30 int Health monitoring logging interval in seconds.
hazelcast.version.check.enabled true bool Enable Hazelcast new version check on startup.
hazelcast.prefer.ipv4.stack true bool Prefer Ipv4 network interface when picking a local address.
hazelcast.io.thread.count 3 int Number of input and output threads.
hazelcast.operation.thread.count -1 int Number of partition based operation handler threads. -1 means CPU core count x 2.
hazelcast.operation.generic.thread.count -1 int Number of generic operation handler threads. -1 means CPU core count x 2.
hazelcast.event.thread.count 5 int Number of event handler threads.
hazelcast.event.queue.capacity 1000000 int Capacity of the internal event queue.
hazelcast.event.queue.timeout.millis 250 int Timeout in milliseconds to enqueue events to the event queue.
hazelcast.connect.all.wait.seconds 120 int Timeout in seconds to connect all other cluster members when a member is joining a cluster.
hazelcast.memcache.enabled true bool Enable Memcache client request listener service.
hazelcast.rest.enabled true bool Enable REST client request listener service.
hazelcast.map.load.chunk.size 1000 int Chunk size for MapLoader 's map initialization process (MapLoder.loadAllKeys()).
hazelcast.merge.first.run.delay.seconds 300 int Initial run delay of split brain/merge process in seconds.
hazelcast.merge.next.run.delay.seconds 120 int Run interval of split brain/merge process in seconds.
hazelcast.operation.call.timeout.millis 60000 int Timeout to wait for a response when a remote call is sent, in milliseconds.
hazelcast.socket.bind.any true bool Bind both server-socket and client-sockets to any local interface.
hazelcast.socket.server.bind.any true bool Bind server-socket to any local interface. If not set, hazelcast.socket.bind.any will be used as default.
hazelcast.socket.client.bind.any true bool Bind client-sockets to any local interface. If not set, hazelcast.socket.bind.any will be used as default.
hazelcast.socket.client.bind true bool Bind the client socket to an interface when connecting to a remote server socket. When set to false, the client socket is not bound to any interface.
hazelcast.socket.receive.buffer.size 32 int Socket receive buffer (SO_RCVBUF) size in KB.
hazelcast.socket.send.buffer.size 32 int Socket send buffer (SO_SNDBUF) size in KB.
hazelcast.socket.linger.seconds 0 int Set socket SO_LINGER option.
hazelcast.socket.keep.alive true bool Socket set keep alive (SO_KEEPALIVE).
hazelcast.socket.no.delay true bool Socket set TCP no delay.
hazelcast.shutdownhook.enabled true bool Enable the Hazelcast shutdownhook thread.
hazelcast.wait.seconds.before.join 5 int Wait time in seconds before the join operation.
hazelcast.max.join.seconds 300 int Join timeout. The maximum time in seconds to try to join before giving up.
hazelcast.max.join.merge.target.seconds 20 int Split-brain merge timeout for a specific target.
hazelcast.max.wait.seconds.before.join 20 int Maximum wait time before the join operation.
hazelcast.heartbeat.interval.seconds 1 int Heartbeat send interval in seconds.
hazelcast.max.no.heartbeat.seconds 500 int Maximum timeout for heartbeat in seconds for a node to assume it is dead.
hazelcast.max.no.master.confirmation.seconds 450 int Maximum timeout of master confirmation from other nodes.
hazelcast.master.confirmation.interval.seconds 30 int Interval at which nodes send master confirmation.
hazelcast.member.list.publish.interval.seconds 600 int Interval at which master node publishes a member list.
hazelcast.icmp.enabled false bool Enable ICMP ping.
hazelcast.icmp.timeout 1000 int ICMP timeout in milliseconds.
hazelcast.icmp.ttl 0 int ICMP TTL (maximum numbers of hops to try).
hazelcast.initial.min.cluster.size 0 int Initial expected cluster size to wait before node to start completely.
hazelcast.initial.wait.seconds 0 int Initial time in seconds to wait before node to start completely.
hazelcast.map.replica.wait.seconds.for.scheduled.tasks 10 int Scheduler delay for the map tasks to be executed on backup members.
hazelcast.partition.count 271 int Total partition count.
hazelcast.logging.type jdk enum Name of logging framework type to send logging events.
hazelcast.jmx false bool Enable JMX agent.
hazelcast.jmx.detailed false bool Enable detailed views on JMX.
hazelcast.mc.max.visible.instance.count 100 int Management Center maximum visible instance count.
hazelcast.mc.url.change.enabled true bool Management Center changing server url is enabled.
hazelcast.connection.monitor.interval 100 int Minimum interval in milliseconds to consider a connection error as critical.
hazelcast.connection.monitor.max.faults 3 int Maximum IO error count before disconnecting from a node.
hazelcast.partition.migration.interval 0 int Interval to run partition migration tasks in seconds.
hazelcast.partition.migration.timeout 300 int Timeout for partition migration tasks in seconds.
hazelcast.partition.migration.zip.enabled true bool Enable compression during partition migration.
hazelcast.partition.table.send.interval 15 int Interval for publishing the partition table periodically to all cluster members.
hazelcast.partition.backup.sync.interval 30 int Interval for syncing backup replicas.
hazelcast.partitioning.strategy.class null string Class name implementing com.hazelcast.core.PartitioningStrategy, which defines the key to partition mapping.
hazelcast.migration.min.delay.on.member.removed.seconds 5 int Minimum delay in seconds between the detection of a member that has left and the start of the rebalancing process.
hazelcast.graceful.shutdown.max.wait 600 int Maximum wait in seconds during a graceful shutdown.
hazelcast.system.log.enabled true bool Enable system logs.
hazelcast.enterprise.license.key null string Hazelcast Enterprise license key.
hazelcast.client.heartbeat.timeout 300000 string Timeout for the heartbeat messages sent by the client to members. If no messages pass between client and member within this time in milliseconds, the connection will be closed.
hazelcast.client.heartbeat.interval 10000 string The frequency of heartbeat messages sent by the clients to members.
hazelcast.client.max.failed.heartbeat.count 3 string When the count of failed heartbeats sent to members reaches this value, the cluster is deemed as dead by the client.
hazelcast.client.request.retry.count 20 string The retry count of the connection requests by the client to the members.
hazelcast.client.request.retry.wait.time 250 string The frequency of the connection retries.
hazelcast.client.event.thread.count 5 string Thread count for handling incoming event packets.
hazelcast.client.event.queue.capacity 1000000 string Default value of the capacity of the executor that handles incoming event packets.