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Posted to notifications@accumulo.apache.org by "keith-turner (via GitHub)" <gi...@apache.org> on 2023/05/04 17:00:57 UTC
[GitHub] [accumulo] keith-turner commented on a diff in pull request #3369: Use empty location in getSplits call for eventual consistency scans
keith-turner commented on code in PR #3369:
URL: https://github.com/apache/accumulo/pull/3369#discussion_r1185226923
##########
hadoop-mapreduce/src/main/java/org/apache/accumulo/hadoopImpl/mapred/AccumuloRecordReader.java:
##########
@@ -348,14 +355,45 @@ public static InputSplit[] getSplits(JobConf job, Class<?> callingClass) throws
// tablets... so clear it
tl.invalidateCache();
- while (!tl.binRanges(context, ranges, binnedRanges).isEmpty()) {
- context.requireNotDeleted(tableId);
- context.requireNotOffline(tableId, tableName);
- binnedRanges.clear();
- log.warn("Unable to locate bins for specified ranges. Retrying.");
- // sleep randomly between 100 and 200 ms
- sleepUninterruptibly(100 + random.nextInt(100), TimeUnit.MILLISECONDS);
- tl.invalidateCache();
+ if (InputConfigurator.getConsistencyLevel(callingClass, job)
+ == ConsistencyLevel.IMMEDIATE) {
+ while (!tl.binRanges(context, ranges, binnedRanges).isEmpty()) {
+ context.requireNotDeleted(tableId);
+ context.requireNotOffline(tableId, tableName);
+ binnedRanges.clear();
+ log.warn("Unable to locate bins for specified ranges. Retrying.");
+ // sleep randomly between 100 and 200 ms
+ sleepUninterruptibly(100 + random.nextInt(100), TimeUnit.MILLISECONDS);
+ tl.invalidateCache();
+ }
+ } else {
+ Map<String,Map<KeyExtent,List<Range>>> unhostedRanges = new HashMap<>();
+ unhostedRanges.put("", new HashMap<>());
+ BiConsumer<CachedTablet,Range> consumer = (ct, r) -> {
+ unhostedRanges.get("").computeIfAbsent(ct.getExtent(), k -> new ArrayList<>())
+ .add(r);
+ };
+ List<Range> failures =
+ tl.findTablets(context, ranges, consumer, LocationNeed.NOT_REQUIRED);
+
+ Retry retry = Retry.builder().infiniteRetries().retryAfter(100, MILLISECONDS)
+ .incrementBy(100, MILLISECONDS).maxWait(2, SECONDS).backOffFactor(1.5)
+ .logInterval(3, MINUTES).createRetry();
+
+ while (!failures.isEmpty()) {
+
Review Comment:
Need to check if the table still exists when failures is non empty. Things end up in failures because it could not find a tablet that overlapped the range. This could be caused by split, merge, or table deletion.
##########
hadoop-mapreduce/src/main/java/org/apache/accumulo/hadoopImpl/mapreduce/AccumuloRecordReader.java:
##########
@@ -381,14 +388,46 @@ public static List<InputSplit> getSplits(JobContext context, Class<?> callingCla
// tables tablets... so clear it
tl.invalidateCache();
- while (!tl.binRanges(clientContext, ranges, binnedRanges).isEmpty()) {
- clientContext.requireNotDeleted(tableId);
- clientContext.requireNotOffline(tableId, tableName);
- binnedRanges.clear();
- log.warn("Unable to locate bins for specified ranges. Retrying.");
- // sleep randomly between 100 and 200 ms
- sleepUninterruptibly(100 + random.nextInt(100), TimeUnit.MILLISECONDS);
- tl.invalidateCache();
+ if (InputConfigurator.getConsistencyLevel(callingClass, context.getConfiguration())
+ == ConsistencyLevel.IMMEDIATE) {
+ while (!tl.binRanges(clientContext, ranges, binnedRanges).isEmpty()) {
+ clientContext.requireNotDeleted(tableId);
+ clientContext.requireNotOffline(tableId, tableName);
+ binnedRanges.clear();
+ log.warn("Unable to locate bins for specified ranges. Retrying.");
+ // sleep randomly between 100 and 200 ms
+ sleepUninterruptibly(100 + random.nextInt(100), TimeUnit.MILLISECONDS);
+ tl.invalidateCache();
+ }
+ } else {
+ Map<String,Map<KeyExtent,List<Range>>> unhostedRanges = new HashMap<>();
+ unhostedRanges.put("", new HashMap<>());
+ BiConsumer<CachedTablet,Range> consumer = (ct, r) -> {
+ unhostedRanges.get("").computeIfAbsent(ct.getExtent(), k -> new ArrayList<>())
+ .add(r);
+ };
+ List<Range> failures =
+ tl.findTablets(clientContext, ranges, consumer, LocationNeed.NOT_REQUIRED);
+
+ Retry retry = Retry.builder().infiniteRetries().retryAfter(100, MILLISECONDS)
+ .incrementBy(100, MILLISECONDS).maxWait(2, SECONDS).backOffFactor(1.5)
+ .logInterval(3, MINUTES).createRetry();
+
+ while (!failures.isEmpty()) {
+
Review Comment:
also need table deletion check
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