IcmpFailureDetectorConfig (Hazelcast Root 3.12.13 API)

java.lang.Object
- com.hazelcast.config.IcmpFailureDetectorConfig

```
public class IcmpFailureDetectorConfig
extends Object
```
This Failure Detector may be configured in addition to one of Deadline and Phi Accual Failure Detectors.
It operates at Layer 3 of the OSI protocol, and provides much quicker and more deterministic detection of hardware
and other lower level events. This detector may be configured to perform an extra check after a member is suspected by one
of the other detectors, or it can work in parallel, which is the default. This way hardware and network level issues
will be detected more quickly.
This failure detector is based on InetAddress.isReachable(). When the JVM process has enough permissions to create RAW sockets, the implementation will choose to rely on ICMP Echo requests. This is preferred. However, if there are not enough permissions, it can be configured to fallback on attempting a TCP Echo on port 7. In the latter case, both a successful connection or an explicit rejection will be treated as "Host is Reachable". This is not preferred as each call creates a heavy weight socket and moreover the Echo service is typically disabled.
For the Ping Failure Detector to rely only on ICMP (RAW sockets) Echo requests, there are some criteria that need to be met. Please consult the Hazelcast Reference Manual on how to configure and what the OS requirements are.

Constructor Summary

Constructors
Constructor and Description

IcmpFailureDetectorConfig()

Constructors
Constructor and Description
`IcmpFailureDetectorConfig()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object o)`
`int`	`getIntervalMilliseconds()`
`int`	`getMaxAttempts()`
`int`	`getTimeoutMilliseconds()`
`int`	`getTtl()`
`int`	`hashCode()`
`boolean`	`isEnabled()`
`boolean`	`isFailFastOnStartup()`
`boolean`	`isParallelMode()`
`IcmpFailureDetectorConfig`	`setEnabled(boolean enabled)` Set whether the ICMP failure detector should be enabled or not.
`IcmpFailureDetectorConfig`	`setFailFastOnStartup(boolean failFastOnStartup)` Sets whether the member should fail-fast on startup if ICMP is not allowed by the underlying OS.
`IcmpFailureDetectorConfig`	`setIntervalMilliseconds(int intervalMilliseconds)` Sets the time in milliseconds between each ping This value can not be smaller than 1000 milliseconds
`IcmpFailureDetectorConfig`	`setMaxAttempts(int maxAttempts)` Set the max ping attempts before suspecting a member
`IcmpFailureDetectorConfig`	`setParallelMode(boolean mode)` Set the ICMP detector to run in parallel mode, independent from the other failure detectors.
`IcmpFailureDetectorConfig`	`setTimeoutMilliseconds(int timeoutMilliseconds)` Sets the timeout in Milliseconds before declaring a failed ping This cannot be more than the interval value.
`IcmpFailureDetectorConfig`	`setTtl(int ttl)` Sets the maximum number of times the IP Datagram (ping) can be forwarded, in most cases all Hazelcast cluster members would be within one network switch/router therefore
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - IcmpFailureDetectorConfig
```
public IcmpFailureDetectorConfig()
```
- Method Detail
  - getTimeoutMilliseconds
```
public int getTimeoutMilliseconds()
```
    Returns:
    
    the timeout in Milliseconds before declaring a failed ping
  - setTimeoutMilliseconds
```
public IcmpFailureDetectorConfig setTimeoutMilliseconds(int timeoutMilliseconds)
```
    Sets the timeout in Milliseconds before declaring a failed ping This cannot be more than the interval value. Should always be smaller.
    
    Parameters:
    
    timeoutMilliseconds - the timeout for each ping in millis
    
    Returns:
    
    this IcmpFailureDetectorConfig instance
  - getIntervalMilliseconds
```
public int getIntervalMilliseconds()
```
    Returns:
    
    the time in milliseconds between each ping
  - setIntervalMilliseconds
```
public IcmpFailureDetectorConfig setIntervalMilliseconds(int intervalMilliseconds)
```
    Sets the time in milliseconds between each ping This value can not be smaller than 1000 milliseconds
    
    Parameters:
    
    intervalMilliseconds - the interval millis between each ping
    
    Returns:
    
    this IcmpFailureDetectorConfig instance
  - isFailFastOnStartup
```
public boolean isFailFastOnStartup()
```
    Returns:
    
    whether the member should fail-fast on startup if ICMP is not allowed by the underlying OS.
  - setFailFastOnStartup
```
public IcmpFailureDetectorConfig setFailFastOnStartup(boolean failFastOnStartup)
```
    Sets whether the member should fail-fast on startup if ICMP is not allowed by the underlying OS. Failure is usually due to OS level restrictions.
    
    Parameters:
    
    failFastOnStartup - the fail-fast flag
    
    Returns:
    
    this IcmpFailureDetectorConfig instance
  - getTtl
```
public int getTtl()
```
    Returns:
    
    the maximum number of times the IP Datagram (ping) can be forwarded
  - setTtl
```
public IcmpFailureDetectorConfig setTtl(int ttl)
```
    Sets the maximum number of times the IP Datagram (ping) can be forwarded, in most cases all Hazelcast cluster members would be within one network switch/router therefore
    
    Parameters:
    
    ttl - the new time-to-live value
    
    Returns:
    
    this IcmpFailureDetectorConfig instance
  - getMaxAttempts
```
public int getMaxAttempts()
```
    Returns:
    
    max ping attempts before suspecting a member
  - setMaxAttempts
```
public IcmpFailureDetectorConfig setMaxAttempts(int maxAttempts)
```
    Set the max ping attempts before suspecting a member
    
    Parameters:
    
    maxAttempts - the max attempts before suspecting a member
    
    Returns:
    
    this IcmpFailureDetectorConfig instance
  - isEnabled
```
public boolean isEnabled()
```
    Returns:
    
    whether the ICMP detector is enabled or not.
  - setEnabled
```
public IcmpFailureDetectorConfig setEnabled(boolean enabled)
```
    Set whether the ICMP failure detector should be enabled or not. When set to true, this member will use icmp ping failure detector to detect unavailable members
  - isParallelMode
```
public boolean isParallelMode()
```
    Returns:
    
    whether the ICMP detector is set in parallel mode, or in legacy (flag value = false).
  - setParallelMode
```
public IcmpFailureDetectorConfig setParallelMode(boolean mode)
```
    Set the ICMP detector to run in parallel mode, independent from the other failure detectors. If set to false (default) then the detector runs in legacy mode, with similar behavior as to Hazelcast version less than 3.9.
    
    Parameters:
    
    mode - the mode representing whether the detector should work in parallel or not
    
    Returns:
    
    this IcmpFailureDetectorConfig instance
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - equals
```
public final boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public final int hashCode()
```
    Overrides:
    
    hashCode in class Object

Class IcmpFailureDetectorConfig

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

IcmpFailureDetectorConfig

Method Detail

getTimeoutMilliseconds

setTimeoutMilliseconds

getIntervalMilliseconds

setIntervalMilliseconds

isFailFastOnStartup

setFailFastOnStartup

getTtl

setTtl

getMaxAttempts

setMaxAttempts

isEnabled

setEnabled

isParallelMode

setParallelMode

toString

equals

hashCode