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https://issues.apache.org/jira/browse/HADOOP-15813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16773551#comment-16773551
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Wei-Chiu Chuang commented on HADOOP-15813:
------------------------------------------
+1
The patch dramatically improves KMS throughput from 2900 decrypt_eek/s to 8100
decrypt_eek/s in my test.
Benchmark setup:
{noformat}
4-node cluster, each node 4 core Intel Xeon 2.5Ghz, 25GB memory
CentOS 7.4, CDH 6.2 + CM 6.2, Cloudera Navigator Key Trustee
Oracle Java 8u181
One KMS server. Heap: 5GB, max thread: 32
{noformat}
Ran the KMS benchmark tool (HADOOP-15967) on 3 other nodes to fully saturate
the KMS server:
{noformat}
HADOOP_CLIENT_OPTS="-Xms10g -Xmx10g"
hadoop jar /tmp/hadoop-kms-3.0.0-cdh6.1.0-tests.jar
org.apache.hadoop.crypto.key.kms.server.KMSBenchmark -op decrypt -threads 100
-numops 2000000
{noformat}
Additionally,
used heap size = 2GB (prior to the patch, heap size would grow until the max
heap size),
open file descriptor 600 (prior to the patch, open file descriptor would grow
to 7000)
> Enable more reliable SSL connection reuse
> -----------------------------------------
>
> Key: HADOOP-15813
> URL: https://issues.apache.org/jira/browse/HADOOP-15813
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 2.6.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Major
> Attachments: HADOOP-15813.patch, HADOOP-15813.patch
>
>
> The java keep-alive cache relies on instance equivalence of the SSL socket
> factory. In many java versions, SSLContext#getSocketFactory always returns a
> new instance which completely breaks the cache. Clients flooding a service
> with lingering per-request connections that can lead to port exhaustion. The
> hadoop SSLFactory should cache the socket factory associated with the context.
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