210517040b
Avoid the pattern where a Random object is allocated, used once or twice, and then left for GC. This pattern triggers warnings from some static analysis tools because this pattern leads to poor effective randomness. In a few cases we were legitimately suffering from this issue; in others a change is still good to reduce noise in analysis results. Use ThreadLocalRandom where there is no requirement to set the seed to gain good reuse. Where useful relax use of SecureRandom to simply Random or ThreadLocalRandom, which are unlikely to block if the system entropy pool is low, if we don't need crypographically strong randomness for the use case. The exception to this is normalization of use of Bytes#random to fill byte arrays with randomness. Because Bytes#random may be used to generate key material it must be backed by SecureRandom. Signed-off-by: Duo Zhang <zhangduo@apache.org> |
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| dev-support | ||
| hbase-annotations | ||
| hbase-archetypes | ||
| hbase-assembly | ||
| hbase-asyncfs | ||
| hbase-build-configuration | ||
| hbase-checkstyle | ||
| hbase-client | ||
| hbase-common | ||
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| hbase-examples | ||
| hbase-external-blockcache | ||
| hbase-hadoop-compat | ||
| hbase-hadoop2-compat | ||
| hbase-hbtop | ||
| hbase-http | ||
| hbase-it | ||
| hbase-logging | ||
| hbase-mapreduce | ||
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| hbase-procedure | ||
| hbase-protocol | ||
| hbase-protocol-shaded | ||
| hbase-replication | ||
| hbase-resource-bundle | ||
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| hbase-server | ||
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| CHANGES.md | ||
| LICENSE.txt | ||
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| README.txt | ||
| RELEASENOTES.md | ||
| pom.xml | ||
README.txt
Apache HBase [1] is an open-source, distributed, versioned, column-oriented store modeled after Google' Bigtable: A Distributed Storage System for Structured Data by Chang et al.[2] Just as Bigtable leverages the distributed data storage provided by the Google File System, HBase provides Bigtable-like capabilities on top of Apache Hadoop [3]. To get started using HBase, the full documentation for this release can be found under the doc/ directory that accompanies this README. Using a browser, open the docs/index.html to view the project home page (or browse to [1]). The hbase 'book' at http://hbase.apache.org/book.html has a 'quick start' section and is where you should being your exploration of the hbase project. The latest HBase can be downloaded from an Apache Mirror [4]. The source code can be found at [5] The HBase issue tracker is at [6] Apache HBase is made available under the Apache License, version 2.0 [7] The HBase mailing lists and archives are listed here [8]. The HBase distribution includes cryptographic software. See the export control notice here [9]. 1. http://hbase.apache.org 2. http://research.google.com/archive/bigtable.html 3. http://hadoop.apache.org 4. http://www.apache.org/dyn/closer.cgi/hbase/ 5. https://hbase.apache.org/source-repository.html 6. https://hbase.apache.org/issue-tracking.html 7. http://hbase.apache.org/license.html 8. http://hbase.apache.org/mail-lists.html 9. https://hbase.apache.org/export_control.html