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https://issues.apache.org/jira/browse/HBASE-27365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17613204#comment-17613204
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Hudson commented on HBASE-27365:
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Results for branch branch-2.5
[build #218 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/218/]:
(x) *{color:red}-1 overall{color}*
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details (if available):
(x) {color:red}-1 general checks{color}
-- For more information [see general
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/218/General_20Nightly_20Build_20Report/]
(x) {color:red}-1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2)
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/218/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/218/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
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(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> Minimise block addition failures due to no space in bucket cache writers
> queue by introducing wait time
> -------------------------------------------------------------------------------------------------------
>
> Key: HBASE-27365
> URL: https://issues.apache.org/jira/browse/HBASE-27365
> Project: HBase
> Issue Type: Improvement
> Components: BucketCache
> Affects Versions: 3.0.0-alpha-3
> Reporter: Rajeshbabu Chintaguntla
> Assignee: Rajeshbabu Chintaguntla
> Priority: Major
> Fix For: 2.6.0, 2.5.1, 3.0.0-alpha-4, 2.4.15
>
>
> Currently in bucket cache asynchronous caching mechanism introduced where
> initially the blocks to be cached will be added to queue and writer threads
> consume the blocks from the queue and write to bucket cache. In case if block
> writing to bucket cache is slow then there is a chance that queue of writer
> threads become full and following block additions will be failed. In case of
> slower storages like s3 might introduce latencies even if we enable bigger
> sizes of bucket cache using ephemeral storages. So we can allow configurable
> wait time while adding blocks to queue so that chances of queue free up is
> possible during the wait time and block addition failures can be minimised.
> To avoid the performance impact of wait time in regular read paths we can use
> the wait time mainly during background operations like compactions, flushes
> or prefetches etc.
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