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Briefly, this error occurs when OpenSearch is unable to establish a connection with the remote clusters within the specified time frame. This could be due to network issues, incorrect cluster settings, or firewall restrictions. To resolve this, you can check your network connectivity, verify the cluster settings, and ensure that the firewall rules allow connections between the clusters. Additionally, increasing the connection timeout period might help if the clusters are located in different geographical locations and the network latency is high.
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This guide will help you check for common problems that cause the log ” failed to connect to remote clusters within {} ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .
Log Context
Log “failed to connect to remote clusters within {}” classname is RemoteClusterService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
try {
future.get(timeValue.millis(); TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} catch (TimeoutException ex) {
logger.warn("failed to connect to remote clusters within {}"; timeValue.toString());
} catch (Exception e) {
throw new IllegalStateException("failed to connect to remote clusters"; e);
}
}
