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ehcache- Initial cause was ICMP Port Unreachable

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Shakthi1
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Shakthi1
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18-01-2019

Getting the below repeatedly on aem6.4.Please any sugesstions.

[Multicast Heartbeat Receiver Thread] net.sf.ehcache.distribution.MulticastKeepaliveHeartbeatReceiver Error receiving heartbeat. ICMP Port Unreachable. Initial cause was ICMP Port Unreachable

java.net.PortUnreachableException: ICMP Port Unreachable

        at java.net.PlainDatagramSocketImpl.receive0(Native Method)

        at java.net.AbstractPlainDatagramSocketImpl.receive(AbstractPlainDatagramSocketImpl.java:143)

        at java.net.DatagramSocket.receive(DatagramSocket.java:812)

        at net.sf.ehcache.distribution.MulticastKeepaliveHeartbeatReceiver$MulticastReceiverThread.run(MulticastKeepaliveHeartbeatReceiver.java:124) [org.apache.servicemix.bundles.ehcache:2.4.3.2]

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Gaurav-Behl
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19-01-2019

If you have observed this error on a consistent basis then most likely its due to firewall issues otherwise if it happens intermittently then it could be due to heavy load on that server/network. Engage network team, find out the server load/statistics, check GC logs, traffic volume, lb logs etc.

If you are using distributed/replicated caching then it could be related to clustered network or server overload within that cluster.Find out recent changes in the setup since you observed the error.

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Jörg_Hoh
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19-01-2019

It's likely a network issue, the system cannot open a socket to listen for UDP packages.

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Shakthi1
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24-01-2019

Thanks a lot the issue is solved now.It was a port that was blocked.