[ https://issues.apache.org/jira/browse/HBASE-12393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ChiaPing Tsai updated HBASE-12393: ---------------------------------- Attachment: (was: HBASE-12393-v2.patch) > The regionserver web will throw exception if we disable block cache > ------------------------------------------------------------------- > > Key: HBASE-12393 > URL: https://issues.apache.org/jira/browse/HBASE-12393 > Project: HBase > Issue Type: Bug > Components: regionserver, UI > Affects Versions: 0.98.7 > Environment: ubuntu 12.04 64bits, hadoop-2.2.0, hbase-0.98.7-hadoop2 > Reporter: ChiaPing Tsai > Assignee: ChiaPing Tsai > Priority: Minor > Fix For: 1.0.0, 2.0.0, 0.98.10, 1.1.0 > > Attachments: HBASE-12393.patch > > > The CacheConfig.getBlockCache() will return the null point when we set > hfile.block.cache.size to zero. > The BlockCacheTmpl.jamon doesn't make a check on null blockcache. > {code} > <%if cacheConfig == null %> > <p>CacheConfig is null</p> > <%else> > <table class="table table-striped"> > <tr> > <th>Attribute</th> > <th>Value</th> > <th>Description</th> > </tr> > <tr> > <td>Size</td> > <td><% > StringUtils.humanReadableInt(cacheConfig.getBlockCache().size()) %></td> > <td>Total size of Block Cache (bytes)</td> > </tr> > <tr> > <td>Free</td> > <td><% > StringUtils.humanReadableInt(cacheConfig.getBlockCache().getFreeSize()) > %></td> > <td>Free space in Block Cache (bytes)</td> > </tr> > <tr> > <td>Count</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getBlockCount()) %></td> > <td>Number of blocks in Block Cache</td> > </tr> > <tr> > <td>Evicted</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getStats().getEvictedCount()) %></td> > <td>Number of blocks evicted</td> > </tr> > <tr> > <td>Evictions</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getStats().getEvictionCount()) %></td> > <td>Number of times an eviction occurred</td> > </tr> > <tr> > <td>Hits</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getStats().getHitCount()) %></td> > <td>Number requests that were cache hits</td> > </tr> > <tr> > <td>Hits Caching</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getStats().getHitCachingCount()) %></td> > <td>Cache hit block requests but only requests set to use Block > Cache</td> > </tr> > <tr> > <td>Misses</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getStats().getMissCount()) %></td> > <td>Number of requests that were cache misses</td> > </tr> > <tr> > <td>Misses Caching</td> > <td><% String.format("%,d", > cacheConfig.getBlockCache().getStats().getMissCount()) %></td> > <td>Block requests that were cache misses but only requests set to > use Block Cache</td> > </tr> > <tr> > <td>Hit Ratio</td> > <td><% String.format("%,.2f", > cacheConfig.getBlockCache().getStats().getHitRatio() * 100) %><% "%" %></td> > <td>Hit Count divided by total requests count</td> > </tr> > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)