Severity: 5-Debug Level 5.Ĭause: A new node has joined an existing Coherence cluster. %s - the full Member information for a new node that joined the cluster this node belongs to %n - the node id of the cluster senior node. Member(%s) joined Cluster with senior member %n Otherwise, identify the running cluster and consider corrective actions. Severity: 3-Informational.Ĭause: This Coherence node has joined an existing cluster.Īction: None, if this node is expected to join an existing cluster. %s1 - the full Member information for this node %s2 - the cluster name %s3 - the full Member information for the cluster senior node. This Member(%s1) joined cluster "%s2" with senior Member(%s3) Otherwise, the operational configuration has to be reviewed to determine the reason that this node does not join the existing cluster. The Member information includes the node id, creation timestamp, unicast address and port, location, process id, role, and so on.Īction: None, if this node is expected to be the first node in the cluster. As a result, it created a new cluster with the specified name (either configured by the element or calculated based on the multicast listener address and port, or the well known addresses list). Severity: 3-Informational.Ĭause: This Coherence node attempted to join an existing cluster in the configured amount of time (specified by the element), but did not receive any responses from any other node. %s1 - the cluster name %s2 - the full Member information. Failure to satisfy that latency causes this message to be logged and increases the latency threshold, which is reflected in a follow up message.Īction: If the latency consistently stays very high (over 100 milliseconds), consult your network administrator and see Performing a Network Performance Test.Ĭreated a new cluster "%s1" with Member(%s2) See incoming-message-handler in Developing Applications with Oracle Coherence. By default, the configured maximum allowed latency (the value of the configuration element) is 16 milliseconds. This step assumes a relatively small latency for peer-to-peer round trip communication between the nodes. Severity: 3-Informational or 5-Debug Level 5 depending on the message frequency.Ĭause: One of the first steps in the Coherence cluster discovery protocol is the calculation of the clock difference between the new and the senior nodes. %n1 - the maximum allowed latency in milliseconds %n2 - the actual latency in milliseconds. See Performance Tuning.įailed to satisfy the variance: allowed=%n1 actual=%n2 If these warnings are seen frequently, review your JVM heap and GC configuration and tuning. Any slowdown in the network or the remote server can trigger this, but the most common cause is GC, which should be investigated first.Īction: Prolonged and frequent garbage collection can adversely affect cluster performance and availability. This message indicates that the overdue acknowledgment has been received from the specified node, and that it has likely emerged from its GC. Severity: 2-Warning or 5-Debug Level 5 or 6-Debug Level 6 depending on the length of the delay.Ĭause: This node detected a delay in receiving acknowledgment packets from the specified node, and has determined that is it likely due to a remote GC (rather than a local GC). %n1 - the latency in milliseconds of the communication delay %s - the full Member information. Log messages that pertain to TCMP Experienced a %n1 ms communication delay (probable remote GC) with Member %s
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