elasticsearch exception[type=search_phase_execution_exception,reason=all shards failed]

This exception occurs when Elasticsearch is unable to successfully execute a search request across all the shards in a cluster. There could be several reasons for this, including:

1. Network connectivity issues: If there are network connectivity issues between the nodes in the cluster, Elasticsearch may not be able to execute the search request across all the shards.

2. High load on the cluster: If the cluster is under high load or experiencing performance issues, Elasticsearch may not be able to execute the search request across all the shards.

3. Indexing issues: If there are indexing issues with the data in the cluster, Elasticsearch may not be able to execute the search request across all the shards.

To resolve this issue, you can try to identify the root cause of the problem by checking the Elasticsearch logs for errors or warnings. You can also try to optimize the cluster's performance by adding more nodes, increasing the resources available to the nodes, or optimizing the search query. If the issue persists, you may need to consult Elasticsearch documentation or seek professional support.