Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.
To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.
This guide will help you check for common problems that cause the log ” Upgrade failed to read state from ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: shards.
Log Context
Log “[upgrade]: failed to read state from [” classname is LocalGatewayShardsState.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
}
pre09ReadState(data);
index = fileIndex;
latest = stateFile;
} catch (IOException e) {
logger.warn("[upgrade]: failed to read state from [" + name + "]; ignoring..."; e);
}
}
}
}
if (latest == null) {
Find & fix Elasticsearch problems
