dsmiley commented on code in PR #2935:
URL: https://github.com/apache/solr/pull/2935#discussion_r1925844451
##########
solr/CHANGES.txt:
##########
@@ -176,6 +176,10 @@ Bug Fixes
* SOLR-17629: If SQLHandler failed to open the underlying stream (e.g. Solr
returns an error; could be user/syntax problem),
it needs to close the stream to cleanup resources but wasn't. (David Smiley)
+* SOLR-17519: SolrJ fix to CloudSolrClient and HTTP ClusterState where it can
fail to request cluster state
+ if its current live nodes list is stale. HTTP ClusterState now retains the
initial configured list of passed URLs as backup
Review Comment:
I don't think Solr users know about "HTTP ClusterState"; it's not likely in
their vocabulary. On the other hand, wording like "SolrJ CloudSolrClient
configured with Solr URLs" is likely to be understood.
##########
solr/solrj/src/java/org/apache/solr/client/solrj/impl/BaseHttpClusterStateProvider.java:
##########
@@ -216,38 +236,42 @@ private SimpleOrderedMap<?> submitClusterStateRequest(
@Override
public Set<String> getLiveNodes() {
- if (liveNodes == null) {
- throw new RuntimeException(
- "We don't know of any live_nodes to fetch the"
- + " latest live_nodes information from. "
- + "If you think your Solr cluster is up and is accessible,"
- + " you could try re-creating a new CloudSolrClient using
working"
- + " solrUrl(s) or zkHost(s).");
- }
if (TimeUnit.SECONDS.convert((System.nanoTime() - liveNodesTimestamp),
TimeUnit.NANOSECONDS)
> getCacheTimeout()) {
- for (String nodeName : liveNodes) {
- String baseUrl = Utils.getBaseUrlForNodeName(nodeName, urlScheme);
- try (SolrClient client = getSolrClient(baseUrl)) {
- Set<String> liveNodes = fetchLiveNodes(client);
- this.liveNodes = (liveNodes);
- liveNodesTimestamp = System.nanoTime();
- return liveNodes;
- } catch (Exception e) {
- log.warn("Attempt to fetch cluster state from {} failed.", baseUrl,
e);
- }
- }
+
+ if (liveNodes.stream()
+ .anyMatch((node) ->
updateLiveNodes(URLUtil.getBaseUrlForNodeName(node, urlScheme))))
+ return this.liveNodes;
+
+ log.warn(
+ "Attempt to fetch cluster state from all known live nodes {} failed.
Trying backup nodes",
+ liveNodes);
+
+ if (configuredNodes.stream().anyMatch((node) ->
updateLiveNodes(node.toString())))
Review Comment:
Shouldn't we check configuredNodes *first* so as to give the user the
possibility of some control, basically addressing the conversation points in
JIRA?
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