avijayanhwx commented on a change in pull request #194: HDDS-2241. Optimize the
refresh pipeline logic used by KeyManagerImpl…
URL: https://github.com/apache/hadoop-ozone/pull/194#discussion_r347661288
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File path:
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/KeyManagerImpl.java
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@@ -688,6 +663,48 @@ public OmKeyInfo lookupKey(OmKeyArgs args, String
clientAddress)
}
}
+ /**
+ * Refresh pipeline info in OM by asking SCM.
+ * @param value OmKeyInfo
+ */
+ @VisibleForTesting
+ protected void refreshPipeline(OmKeyInfo value) {
+ // Refresh container pipeline info from SCM
+ // based on OmKeyArgs.refreshPipeline flag
+ // 1. Client send initial read request OmKeyArgs.refreshPipeline = false
+ // and uses the pipeline cached in OM to access datanode
+ // 2. If succeeded, done.
+ // 3. If failed due to pipeline does not exist or invalid pipeline state
+ // exception, client should retry lookupKey with
+ // OmKeyArgs.refreshPipeline = true
+ Map<Long, ContainerWithPipeline> containerWithPipelineMap = new
HashMap<>();
+ for (OmKeyLocationInfoGroup key : value.getKeyLocationVersions()) {
+ key.getLocationList().forEach(k -> {
+ // TODO: fix Some tests that may not initialize container client
+ // The production should always have containerClient initialized.
+ if (scmClient.getContainerClient() != null) {
+ ContainerWithPipeline cp = containerWithPipelineMap
+ .computeIfAbsent(k.getContainerID(), cId -> {
+ try {
+ return scmClient.getContainerClient()
+ .getContainerWithPipeline(cId);
+ } catch (IOException e) {
+ LOG.error("Unable to update pipeline for container:{}",
+ k.getContainerID());
+ return null;
+ }
+ });
+ if (cp == null) {
+ return;
Review comment:
Refactored the logic to throw exception when the call to SCM fails.
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