http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6a13df3e/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html index 0129065..f72db18 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/CatalogJanitor.html @@ -222,227 +222,228 @@ <span class="sourceLineNo">214</span> int scan() throws IOException {<a name="line.214"></a> <span class="sourceLineNo">215</span> try {<a name="line.215"></a> <span class="sourceLineNo">216</span> if (!alreadyRunning.compareAndSet(false, true)) {<a name="line.216"></a> -<span class="sourceLineNo">217</span> return 0;<a name="line.217"></a> -<span class="sourceLineNo">218</span> }<a name="line.218"></a> -<span class="sourceLineNo">219</span> Triple<Integer, Map<HRegionInfo, Result>, Map<HRegionInfo, Result>> scanTriple =<a name="line.219"></a> -<span class="sourceLineNo">220</span> getMergedRegionsAndSplitParents();<a name="line.220"></a> -<span class="sourceLineNo">221</span> int count = scanTriple.getFirst();<a name="line.221"></a> -<span class="sourceLineNo">222</span> /**<a name="line.222"></a> -<span class="sourceLineNo">223</span> * clean merge regions first<a name="line.223"></a> -<span class="sourceLineNo">224</span> */<a name="line.224"></a> -<span class="sourceLineNo">225</span> int mergeCleaned = 0;<a name="line.225"></a> -<span class="sourceLineNo">226</span> Map<HRegionInfo, Result> mergedRegions = scanTriple.getSecond();<a name="line.226"></a> -<span class="sourceLineNo">227</span> for (Map.Entry<HRegionInfo, Result> e : mergedRegions.entrySet()) {<a name="line.227"></a> -<span class="sourceLineNo">228</span> PairOfSameType<HRegionInfo> p = MetaTableAccessor.getMergeRegions(e.getValue());<a name="line.228"></a> -<span class="sourceLineNo">229</span> HRegionInfo regionA = p.getFirst();<a name="line.229"></a> -<span class="sourceLineNo">230</span> HRegionInfo regionB = p.getSecond();<a name="line.230"></a> -<span class="sourceLineNo">231</span> if (regionA == null || regionB == null) {<a name="line.231"></a> -<span class="sourceLineNo">232</span> LOG.warn("Unexpected references regionA="<a name="line.232"></a> -<span class="sourceLineNo">233</span> + (regionA == null ? "null" : regionA.getRegionNameAsString())<a name="line.233"></a> -<span class="sourceLineNo">234</span> + ",regionB="<a name="line.234"></a> -<span class="sourceLineNo">235</span> + (regionB == null ? "null" : regionB.getRegionNameAsString())<a name="line.235"></a> -<span class="sourceLineNo">236</span> + " in merged region " + e.getKey().getRegionNameAsString());<a name="line.236"></a> -<span class="sourceLineNo">237</span> } else {<a name="line.237"></a> -<span class="sourceLineNo">238</span> if (cleanMergeRegion(e.getKey(), regionA, regionB)) {<a name="line.238"></a> -<span class="sourceLineNo">239</span> mergeCleaned++;<a name="line.239"></a> -<span class="sourceLineNo">240</span> }<a name="line.240"></a> -<span class="sourceLineNo">241</span> }<a name="line.241"></a> -<span class="sourceLineNo">242</span> }<a name="line.242"></a> -<span class="sourceLineNo">243</span> /**<a name="line.243"></a> -<span class="sourceLineNo">244</span> * clean split parents<a name="line.244"></a> -<span class="sourceLineNo">245</span> */<a name="line.245"></a> -<span class="sourceLineNo">246</span> Map<HRegionInfo, Result> splitParents = scanTriple.getThird();<a name="line.246"></a> -<span class="sourceLineNo">247</span><a name="line.247"></a> -<span class="sourceLineNo">248</span> // Now work on our list of found parents. See if any we can clean up.<a name="line.248"></a> -<span class="sourceLineNo">249</span> int splitCleaned = 0;<a name="line.249"></a> -<span class="sourceLineNo">250</span> // regions whose parents are still around<a name="line.250"></a> -<span class="sourceLineNo">251</span> HashSet<String> parentNotCleaned = new HashSet<String>();<a name="line.251"></a> -<span class="sourceLineNo">252</span> for (Map.Entry<HRegionInfo, Result> e : splitParents.entrySet()) {<a name="line.252"></a> -<span class="sourceLineNo">253</span> if (!parentNotCleaned.contains(e.getKey().getEncodedName()) &&<a name="line.253"></a> -<span class="sourceLineNo">254</span> cleanParent(e.getKey(), e.getValue())) {<a name="line.254"></a> -<span class="sourceLineNo">255</span> splitCleaned++;<a name="line.255"></a> -<span class="sourceLineNo">256</span> } else {<a name="line.256"></a> -<span class="sourceLineNo">257</span> // We could not clean the parent, so it's daughters should not be<a name="line.257"></a> -<span 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splitCleaned<a name="line.267"></a> -<span class="sourceLineNo">268</span> + " unreferenced parent region(s)");<a name="line.268"></a> -<span class="sourceLineNo">269</span> } else if (LOG.isTraceEnabled()) {<a name="line.269"></a> -<span class="sourceLineNo">270</span> LOG.trace("Scanned " + count + " catalog row(s), gc'd " + mergeCleaned<a name="line.270"></a> -<span class="sourceLineNo">271</span> + " unreferenced merged region(s) and " + splitCleaned<a name="line.271"></a> -<span class="sourceLineNo">272</span> + " unreferenced parent region(s)");<a name="line.272"></a> -<span class="sourceLineNo">273</span> }<a name="line.273"></a> -<span class="sourceLineNo">274</span> return mergeCleaned + splitCleaned;<a name="line.274"></a> -<span class="sourceLineNo">275</span> } finally {<a name="line.275"></a> -<span class="sourceLineNo">276</span> alreadyRunning.set(false);<a name="line.276"></a> -<span class="sourceLineNo">277</span> }<a name="line.277"></a> -<span class="sourceLineNo">278</span> }<a name="line.278"></a> -<span class="sourceLineNo">279</span><a name="line.279"></a> -<span class="sourceLineNo">280</span> /**<a name="line.280"></a> -<span class="sourceLineNo">281</span> * Compare HRegionInfos in a way that has split parents sort BEFORE their<a name="line.281"></a> -<span class="sourceLineNo">282</span> * daughters.<a name="line.282"></a> -<span class="sourceLineNo">283</span> */<a name="line.283"></a> -<span class="sourceLineNo">284</span> static class SplitParentFirstComparator implements Comparator<HRegionInfo> {<a name="line.284"></a> -<span class="sourceLineNo">285</span> Comparator<byte[]> rowEndKeyComparator = new Bytes.RowEndKeyComparator();<a name="line.285"></a> -<span class="sourceLineNo">286</span> @Override<a name="line.286"></a> -<span class="sourceLineNo">287</span> public int compare(HRegionInfo left, HRegionInfo right) {<a name="line.287"></a> -<span class="sourceLineNo">288</span> // This comparator differs from the one HRegionInfo in that it sorts<a name="line.288"></a> -<span class="sourceLineNo">289</span> // parent before daughters.<a name="line.289"></a> -<span class="sourceLineNo">290</span> if (left == null) return -1;<a name="line.290"></a> -<span class="sourceLineNo">291</span> if (right == null) return 1;<a name="line.291"></a> -<span class="sourceLineNo">292</span> // Same table name.<a name="line.292"></a> -<span class="sourceLineNo">293</span> int result = left.getTable().compareTo(right.getTable());<a name="line.293"></a> -<span class="sourceLineNo">294</span> if (result != 0) return result;<a name="line.294"></a> -<span class="sourceLineNo">295</span> // Compare start keys.<a name="line.295"></a> -<span class="sourceLineNo">296</span> result = Bytes.compareTo(left.getStartKey(), right.getStartKey());<a name="line.296"></a> -<span class="sourceLineNo">297</span> if (result != 0) return result;<a name="line.297"></a> -<span class="sourceLineNo">298</span> // Compare end keys, but flip the operands so parent comes first<a name="line.298"></a> -<span class="sourceLineNo">299</span> result = rowEndKeyComparator.compare(right.getEndKey(), left.getEndKey());<a name="line.299"></a> -<span class="sourceLineNo">300</span><a name="line.300"></a> -<span class="sourceLineNo">301</span> return result;<a name="line.301"></a> -<span class="sourceLineNo">302</span> }<a name="line.302"></a> -<span class="sourceLineNo">303</span> }<a name="line.303"></a> -<span class="sourceLineNo">304</span><a name="line.304"></a> -<span class="sourceLineNo">305</span> /**<a name="line.305"></a> -<span class="sourceLineNo">306</span> * If daughters no longer hold reference to the parents, delete the parent.<a name="line.306"></a> -<span class="sourceLineNo">307</span> * @param parent HRegionInfo of split offlined parent<a name="line.307"></a> -<span class="sourceLineNo">308</span> * @param rowContent Content of <code>parent</code> row in<a name="line.308"></a> -<span class="sourceLineNo">309</span> * <code>metaRegionName</code><a name="line.309"></a> -<span class="sourceLineNo">310</span> * @return True if we removed <code>parent</code> from meta table and from<a name="line.310"></a> -<span class="sourceLineNo">311</span> * the filesystem.<a name="line.311"></a> -<span class="sourceLineNo">312</span> * @throws IOException<a name="line.312"></a> -<span class="sourceLineNo">313</span> */<a name="line.313"></a> -<span class="sourceLineNo">314</span> boolean cleanParent(final HRegionInfo parent, Result rowContent)<a name="line.314"></a> -<span class="sourceLineNo">315</span> throws IOException {<a name="line.315"></a> -<span class="sourceLineNo">316</span> boolean result = false;<a name="line.316"></a> -<span class="sourceLineNo">317</span> // Check whether it is a merged region and not clean reference<a name="line.317"></a> -<span class="sourceLineNo">318</span> // No necessary to check MERGEB_QUALIFIER because these two qualifiers will<a name="line.318"></a> -<span class="sourceLineNo">319</span> // be inserted/deleted together<a name="line.319"></a> -<span class="sourceLineNo">320</span> if (rowContent.getValue(HConstants.CATALOG_FAMILY,<a name="line.320"></a> -<span class="sourceLineNo">321</span> HConstants.MERGEA_QUALIFIER) != null) {<a name="line.321"></a> -<span class="sourceLineNo">322</span> // wait cleaning merge region first<a name="line.322"></a> -<span class="sourceLineNo">323</span> return result;<a name="line.323"></a> -<span class="sourceLineNo">324</span> }<a name="line.324"></a> -<span class="sourceLineNo">325</span> // Run checks on each daughter split.<a name="line.325"></a> -<span class="sourceLineNo">326</span> PairOfSameType<HRegionInfo> daughters = MetaTableAccessor.getDaughterRegions(rowContent);<a name="line.326"></a> -<span class="sourceLineNo">327</span> Pair<Boolean, Boolean> a = checkDaughterInFs(parent, daughters.getFirst());<a name="line.327"></a> -<span class="sourceLineNo">328</span> Pair<Boolean, Boolean> b = checkDaughterInFs(parent, daughters.getSecond());<a name="line.328"></a> -<span class="sourceLineNo">329</span> if (hasNoReferences(a) && hasNoReferences(b)) {<a name="line.329"></a> -<span class="sourceLineNo">330</span> LOG.debug("Deleting region " + parent.getRegionNameAsString() +<a name="line.330"></a> -<span class="sourceLineNo">331</span> " because daughter splits no longer hold references");<a name="line.331"></a> -<span class="sourceLineNo">332</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.332"></a> -<span class="sourceLineNo">333</span> if (LOG.isTraceEnabled()) LOG.trace("Archiving parent region: " + parent);<a name="line.333"></a> -<span class="sourceLineNo">334</span> HFileArchiver.archiveRegion(this.services.getConfiguration(), fs, parent);<a name="line.334"></a> -<span class="sourceLineNo">335</span> MetaTableAccessor.deleteRegion(this.connection, parent);<a name="line.335"></a> -<span 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region directory exists in the filesystem and then the second boolean says<a name="line.357"></a> -<span class="sourceLineNo">358</span> * whether the daughter has references to the parent.<a name="line.358"></a> -<span class="sourceLineNo">359</span> * @throws IOException<a name="line.359"></a> -<span class="sourceLineNo">360</span> */<a name="line.360"></a> -<span class="sourceLineNo">361</span> Pair<Boolean, Boolean> checkDaughterInFs(final HRegionInfo parent, final HRegionInfo daughter)<a name="line.361"></a> -<span class="sourceLineNo">362</span> throws IOException {<a name="line.362"></a> -<span class="sourceLineNo">363</span> if (daughter == null) {<a name="line.363"></a> -<span class="sourceLineNo">364</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.364"></a> -<span class="sourceLineNo">365</span> }<a name="line.365"></a> -<span class="sourceLineNo">366</span><a name="line.366"></a> -<span class="sourceLineNo">367</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.367"></a> -<span class="sourceLineNo">368</span> Path rootdir = this.services.getMasterFileSystem().getRootDir();<a name="line.368"></a> -<span class="sourceLineNo">369</span> Path tabledir = FSUtils.getTableDir(rootdir, daughter.getTable());<a name="line.369"></a> -<span class="sourceLineNo">370</span><a name="line.370"></a> -<span class="sourceLineNo">371</span> Path daughterRegionDir = new Path(tabledir, daughter.getEncodedName());<a name="line.371"></a> -<span class="sourceLineNo">372</span><a name="line.372"></a> -<span class="sourceLineNo">373</span> HRegionFileSystem regionFs = null;<a name="line.373"></a> -<span class="sourceLineNo">374</span><a name="line.374"></a> -<span class="sourceLineNo">375</span> try {<a name="line.375"></a> -<span class="sourceLineNo">376</span> if (!FSUtils.isExists(fs, daughterRegionDir)) {<a name="line.376"></a> -<span class="sourceLineNo">377</span> return new Pair<Boolean, 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region and already has merge<a name="line.418"></a> -<span class="sourceLineNo">419</span> // qualifier<a name="line.419"></a> -<span class="sourceLineNo">420</span> Pair<HRegionInfo, HRegionInfo> mergeRegions = MetaTableAccessor<a name="line.420"></a> -<span class="sourceLineNo">421</span> .getRegionsFromMergeQualifier(this.services.getConnection(),<a name="line.421"></a> -<span class="sourceLineNo">422</span> region.getRegionName());<a name="line.422"></a> -<span class="sourceLineNo">423</span> if (mergeRegions == null<a name="line.423"></a> -<span class="sourceLineNo">424</span> || (mergeRegions.getFirst() == null && mergeRegions.getSecond() == null)) {<a name="line.424"></a> -<span class="sourceLineNo">425</span> // It doesn't have merge qualifier, no need to clean<a name="line.425"></a> -<span class="sourceLineNo">426</span> return true;<a name="line.426"></a> -<span class="sourceLineNo">427</span> }<a name="line.427"></a> -<span class="sourceLineNo">428</span> // It shouldn't 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(Map.Entry<HRegionInfo, Result> e : mergedRegions.entrySet()) {<a name="line.228"></a> +<span class="sourceLineNo">229</span> PairOfSameType<HRegionInfo> p = MetaTableAccessor.getMergeRegions(e.getValue());<a name="line.229"></a> +<span class="sourceLineNo">230</span> HRegionInfo regionA = p.getFirst();<a name="line.230"></a> +<span class="sourceLineNo">231</span> HRegionInfo regionB = p.getSecond();<a name="line.231"></a> +<span class="sourceLineNo">232</span> if (regionA == null || regionB == null) {<a name="line.232"></a> +<span class="sourceLineNo">233</span> LOG.warn("Unexpected references regionA="<a name="line.233"></a> +<span class="sourceLineNo">234</span> + (regionA == null ? "null" : regionA.getRegionNameAsString())<a name="line.234"></a> +<span class="sourceLineNo">235</span> + ",regionB="<a name="line.235"></a> +<span class="sourceLineNo">236</span> + (regionB == null ? "null" : regionB.getRegionNameAsString())<a name="line.236"></a> +<span class="sourceLineNo">237</span> + " in merged region " + e.getKey().getRegionNameAsString());<a name="line.237"></a> +<span class="sourceLineNo">238</span> } else {<a name="line.238"></a> +<span class="sourceLineNo">239</span> if (cleanMergeRegion(e.getKey(), regionA, regionB)) {<a name="line.239"></a> +<span class="sourceLineNo">240</span> mergeCleaned++;<a name="line.240"></a> +<span class="sourceLineNo">241</span> }<a name="line.241"></a> +<span class="sourceLineNo">242</span> }<a name="line.242"></a> +<span class="sourceLineNo">243</span> }<a name="line.243"></a> +<span class="sourceLineNo">244</span> /**<a name="line.244"></a> +<span class="sourceLineNo">245</span> * clean split parents<a name="line.245"></a> +<span class="sourceLineNo">246</span> */<a name="line.246"></a> +<span class="sourceLineNo">247</span> Map<HRegionInfo, Result> splitParents = scanTriple.getThird();<a name="line.247"></a> +<span class="sourceLineNo">248</span><a name="line.248"></a> +<span class="sourceLineNo">249</span> // Now work on our list of found parents. See if any we can clean up.<a name="line.249"></a> +<span class="sourceLineNo">250</span> int splitCleaned = 0;<a name="line.250"></a> +<span class="sourceLineNo">251</span> // regions whose parents are still around<a name="line.251"></a> +<span class="sourceLineNo">252</span> HashSet<String> parentNotCleaned = new HashSet<String>();<a name="line.252"></a> +<span class="sourceLineNo">253</span> for (Map.Entry<HRegionInfo, Result> e : splitParents.entrySet()) {<a name="line.253"></a> +<span class="sourceLineNo">254</span> if (!parentNotCleaned.contains(e.getKey().getEncodedName()) &&<a name="line.254"></a> +<span class="sourceLineNo">255</span> cleanParent(e.getKey(), e.getValue())) {<a name="line.255"></a> +<span class="sourceLineNo">256</span> splitCleaned++;<a name="line.256"></a> +<span class="sourceLineNo">257</span> } else {<a name="line.257"></a> +<span class="sourceLineNo">258</span> // We could not clean the parent, so it's daughters should not be<a name="line.258"></a> +<span class="sourceLineNo">259</span> // cleaned either (HBASE-6160)<a name="line.259"></a> +<span class="sourceLineNo">260</span> PairOfSameType<HRegionInfo> daughters =<a name="line.260"></a> +<span class="sourceLineNo">261</span> MetaTableAccessor.getDaughterRegions(e.getValue());<a name="line.261"></a> +<span class="sourceLineNo">262</span> parentNotCleaned.add(daughters.getFirst().getEncodedName());<a name="line.262"></a> +<span class="sourceLineNo">263</span> parentNotCleaned.add(daughters.getSecond().getEncodedName());<a name="line.263"></a> +<span class="sourceLineNo">264</span> }<a name="line.264"></a> +<span class="sourceLineNo">265</span> }<a name="line.265"></a> +<span class="sourceLineNo">266</span> if ((mergeCleaned + splitCleaned) != 0) {<a name="line.266"></a> +<span class="sourceLineNo">267</span> LOG.info("Scanned " + count + " catalog row(s), gc'd " + mergeCleaned<a name="line.267"></a> +<span class="sourceLineNo">268</span> + " unreferenced merged region(s) and " + splitCleaned<a name="line.268"></a> +<span class="sourceLineNo">269</span> + " unreferenced parent region(s)");<a name="line.269"></a> +<span class="sourceLineNo">270</span> } else if (LOG.isTraceEnabled()) {<a name="line.270"></a> +<span class="sourceLineNo">271</span> LOG.trace("Scanned " + count + " catalog row(s), gc'd " + mergeCleaned<a name="line.271"></a> +<span class="sourceLineNo">272</span> + " unreferenced merged region(s) and " + splitCleaned<a name="line.272"></a> +<span class="sourceLineNo">273</span> + " unreferenced parent region(s)");<a name="line.273"></a> +<span class="sourceLineNo">274</span> }<a name="line.274"></a> +<span class="sourceLineNo">275</span> return mergeCleaned + splitCleaned;<a name="line.275"></a> +<span class="sourceLineNo">276</span> } finally {<a name="line.276"></a> +<span class="sourceLineNo">277</span> alreadyRunning.set(false);<a name="line.277"></a> +<span class="sourceLineNo">278</span> }<a name="line.278"></a> +<span class="sourceLineNo">279</span> }<a name="line.279"></a> +<span class="sourceLineNo">280</span><a name="line.280"></a> +<span class="sourceLineNo">281</span> /**<a name="line.281"></a> +<span class="sourceLineNo">282</span> * Compare HRegionInfos in a way that has split parents sort BEFORE their<a name="line.282"></a> +<span class="sourceLineNo">283</span> * daughters.<a name="line.283"></a> +<span class="sourceLineNo">284</span> */<a name="line.284"></a> +<span class="sourceLineNo">285</span> static class SplitParentFirstComparator implements Comparator<HRegionInfo> {<a name="line.285"></a> +<span class="sourceLineNo">286</span> Comparator<byte[]> rowEndKeyComparator = new Bytes.RowEndKeyComparator();<a name="line.286"></a> +<span class="sourceLineNo">287</span> @Override<a name="line.287"></a> +<span class="sourceLineNo">288</span> public int compare(HRegionInfo left, HRegionInfo right) {<a name="line.288"></a> +<span class="sourceLineNo">289</span> // This comparator differs from the one HRegionInfo in that it sorts<a name="line.289"></a> +<span class="sourceLineNo">290</span> // parent before daughters.<a name="line.290"></a> +<span class="sourceLineNo">291</span> if (left == null) return -1;<a name="line.291"></a> +<span class="sourceLineNo">292</span> if (right == null) return 1;<a name="line.292"></a> +<span class="sourceLineNo">293</span> // Same table name.<a name="line.293"></a> +<span class="sourceLineNo">294</span> int result = left.getTable().compareTo(right.getTable());<a name="line.294"></a> +<span class="sourceLineNo">295</span> if (result != 0) return result;<a name="line.295"></a> +<span class="sourceLineNo">296</span> // Compare start keys.<a name="line.296"></a> +<span class="sourceLineNo">297</span> result = Bytes.compareTo(left.getStartKey(), right.getStartKey());<a name="line.297"></a> +<span class="sourceLineNo">298</span> if (result != 0) return result;<a name="line.298"></a> +<span class="sourceLineNo">299</span> // Compare end keys, but flip the operands so parent comes first<a name="line.299"></a> +<span class="sourceLineNo">300</span> result = rowEndKeyComparator.compare(right.getEndKey(), left.getEndKey());<a name="line.300"></a> +<span class="sourceLineNo">301</span><a name="line.301"></a> +<span class="sourceLineNo">302</span> return result;<a name="line.302"></a> +<span class="sourceLineNo">303</span> }<a name="line.303"></a> +<span class="sourceLineNo">304</span> }<a name="line.304"></a> +<span class="sourceLineNo">305</span><a name="line.305"></a> +<span class="sourceLineNo">306</span> /**<a name="line.306"></a> +<span class="sourceLineNo">307</span> * If daughters no longer hold reference to the parents, delete the parent.<a name="line.307"></a> +<span class="sourceLineNo">308</span> * @param parent HRegionInfo of split offlined parent<a name="line.308"></a> +<span class="sourceLineNo">309</span> * @param rowContent Content of <code>parent</code> row in<a name="line.309"></a> +<span class="sourceLineNo">310</span> * <code>metaRegionName</code><a name="line.310"></a> +<span class="sourceLineNo">311</span> * @return True if we removed <code>parent</code> from meta table and from<a name="line.311"></a> +<span class="sourceLineNo">312</span> * the filesystem.<a name="line.312"></a> +<span class="sourceLineNo">313</span> * @throws IOException<a name="line.313"></a> +<span class="sourceLineNo">314</span> */<a name="line.314"></a> +<span class="sourceLineNo">315</span> boolean cleanParent(final HRegionInfo parent, Result rowContent)<a name="line.315"></a> +<span class="sourceLineNo">316</span> throws IOException {<a name="line.316"></a> +<span class="sourceLineNo">317</span> boolean result = false;<a name="line.317"></a> +<span class="sourceLineNo">318</span> // Check whether it is a merged region and not clean reference<a name="line.318"></a> +<span class="sourceLineNo">319</span> // No necessary to check MERGEB_QUALIFIER because these two qualifiers will<a name="line.319"></a> +<span class="sourceLineNo">320</span> // be inserted/deleted together<a name="line.320"></a> +<span class="sourceLineNo">321</span> if (rowContent.getValue(HConstants.CATALOG_FAMILY,<a name="line.321"></a> +<span class="sourceLineNo">322</span> HConstants.MERGEA_QUALIFIER) != null) {<a name="line.322"></a> +<span class="sourceLineNo">323</span> // wait cleaning merge region first<a name="line.323"></a> +<span class="sourceLineNo">324</span> return result;<a name="line.324"></a> +<span class="sourceLineNo">325</span> }<a name="line.325"></a> +<span class="sourceLineNo">326</span> // Run checks on each daughter split.<a name="line.326"></a> +<span class="sourceLineNo">327</span> PairOfSameType<HRegionInfo> daughters = MetaTableAccessor.getDaughterRegions(rowContent);<a name="line.327"></a> +<span class="sourceLineNo">328</span> Pair<Boolean, Boolean> a = checkDaughterInFs(parent, daughters.getFirst());<a name="line.328"></a> +<span class="sourceLineNo">329</span> Pair<Boolean, Boolean> b = checkDaughterInFs(parent, daughters.getSecond());<a name="line.329"></a> +<span class="sourceLineNo">330</span> if (hasNoReferences(a) && hasNoReferences(b)) {<a name="line.330"></a> +<span class="sourceLineNo">331</span> LOG.debug("Deleting region " + parent.getRegionNameAsString() +<a name="line.331"></a> +<span class="sourceLineNo">332</span> " because daughter splits no longer hold references");<a name="line.332"></a> +<span class="sourceLineNo">333</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.333"></a> +<span class="sourceLineNo">334</span> if (LOG.isTraceEnabled()) LOG.trace("Archiving parent region: " + parent);<a name="line.334"></a> +<span class="sourceLineNo">335</span> HFileArchiver.archiveRegion(this.services.getConfiguration(), fs, parent);<a name="line.335"></a> +<span class="sourceLineNo">336</span> MetaTableAccessor.deleteRegion(this.connection, parent);<a name="line.336"></a> +<span class="sourceLineNo">337</span> result = true;<a name="line.337"></a> +<span class="sourceLineNo">338</span> }<a name="line.338"></a> +<span class="sourceLineNo">339</span> return result;<a name="line.339"></a> +<span class="sourceLineNo">340</span> }<a name="line.340"></a> +<span class="sourceLineNo">341</span><a name="line.341"></a> +<span class="sourceLineNo">342</span> /**<a name="line.342"></a> +<span class="sourceLineNo">343</span> * @param p A pair where the first boolean says whether or not the daughter<a name="line.343"></a> +<span class="sourceLineNo">344</span> * region directory exists in the filesystem and then the second boolean says<a name="line.344"></a> +<span class="sourceLineNo">345</span> * whether the daughter has references to the parent.<a name="line.345"></a> +<span class="sourceLineNo">346</span> * @return True the passed <code>p</code> signifies no references.<a name="line.346"></a> +<span class="sourceLineNo">347</span> */<a name="line.347"></a> +<span class="sourceLineNo">348</span> private boolean hasNoReferences(final Pair<Boolean, Boolean> p) {<a name="line.348"></a> +<span class="sourceLineNo">349</span> return !p.getFirst() || !p.getSecond();<a name="line.349"></a> +<span class="sourceLineNo">350</span> }<a name="line.350"></a> +<span class="sourceLineNo">351</span><a name="line.351"></a> +<span class="sourceLineNo">352</span> /**<a name="line.352"></a> +<span class="sourceLineNo">353</span> * Checks if a daughter region -- either splitA or splitB -- still holds<a name="line.353"></a> +<span class="sourceLineNo">354</span> * references to parent.<a name="line.354"></a> +<span class="sourceLineNo">355</span> * @param parent Parent region<a name="line.355"></a> +<span class="sourceLineNo">356</span> * @param daughter Daughter region<a name="line.356"></a> +<span class="sourceLineNo">357</span> * @return A pair where the first boolean says whether or not the daughter<a name="line.357"></a> +<span class="sourceLineNo">358</span> * region directory exists in the filesystem and then the second boolean says<a name="line.358"></a> +<span class="sourceLineNo">359</span> * whether the daughter has references to the parent.<a name="line.359"></a> +<span class="sourceLineNo">360</span> * @throws IOException<a name="line.360"></a> +<span class="sourceLineNo">361</span> */<a name="line.361"></a> +<span class="sourceLineNo">362</span> Pair<Boolean, Boolean> checkDaughterInFs(final HRegionInfo parent, final HRegionInfo daughter)<a name="line.362"></a> +<span class="sourceLineNo">363</span> throws IOException {<a name="line.363"></a> +<span class="sourceLineNo">364</span> if (daughter == null) {<a name="line.364"></a> +<span class="sourceLineNo">365</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.365"></a> +<span class="sourceLineNo">366</span> }<a name="line.366"></a> +<span class="sourceLineNo">367</span><a name="line.367"></a> +<span class="sourceLineNo">368</span> FileSystem fs = this.services.getMasterFileSystem().getFileSystem();<a name="line.368"></a> +<span class="sourceLineNo">369</span> Path rootdir = this.services.getMasterFileSystem().getRootDir();<a name="line.369"></a> +<span class="sourceLineNo">370</span> Path tabledir = FSUtils.getTableDir(rootdir, daughter.getTable());<a name="line.370"></a> +<span class="sourceLineNo">371</span><a name="line.371"></a> +<span class="sourceLineNo">372</span> Path daughterRegionDir = new Path(tabledir, daughter.getEncodedName());<a name="line.372"></a> +<span class="sourceLineNo">373</span><a name="line.373"></a> +<span class="sourceLineNo">374</span> HRegionFileSystem regionFs = null;<a name="line.374"></a> +<span class="sourceLineNo">375</span><a name="line.375"></a> +<span class="sourceLineNo">376</span> try {<a name="line.376"></a> +<span class="sourceLineNo">377</span> if (!FSUtils.isExists(fs, daughterRegionDir)) {<a name="line.377"></a> +<span class="sourceLineNo">378</span> return new Pair<Boolean, Boolean>(Boolean.FALSE, Boolean.FALSE);<a name="line.378"></a> +<span class="sourceLineNo">379</span> }<a name="line.379"></a> +<span class="sourceLineNo">380</span> } catch (IOException ioe) {<a name="line.380"></a> +<span class="sourceLineNo">381</span> LOG.warn("Error trying to determine if daughter region exists, " +<a name="line.381"></a> +<span class="sourceLineNo">382</span> "assuming exists and has references", ioe);<a name="line.382"></a> +<span class="sourceLineNo">383</span> return new Pair<Boolean, Boolean>(Boolean.TRUE, Boolean.TRUE);<a name="line.383"></a> +<span class="sourceLineNo">384</span> }<a name="line.384"></a> +<span class="sourceLineNo">385</span><a name="line.385"></a> +<span class="sourceLineNo">386</span> try {<a name="line.386"></a> +<span class="sourceLineNo">387</span> regionFs = HRegionFileSystem.openRegionFromFileSystem(<a name="line.387"></a> +<span class="sourceLineNo">388</span> this.services.getConfiguration(), fs, tabledir, daughter, true);<a name="line.388"></a> +<span class="sourceLineNo">389</span> } catch (IOException e) {<a name="line.389"></a> +<span class="sourceLineNo">390</span> LOG.warn("Error trying to determine referenced files from : " + daughter.getEncodedName()<a name="line.390"></a> +<span class="sourceLineNo">391</span> + ", to: " + parent.getEncodedName() + " assuming has references", e);<a name="line.391"></a> +<span class="sourceLineNo">392</span> return new Pair<Boolean, Boolean>(Boolean.TRUE, Boolean.TRUE);<a name="line.392"></a> +<span class="sourceLineNo">393</span> }<a name="line.393"></a> +<span class="sourceLineNo">394</span><a name="line.394"></a> +<span class="sourceLineNo">395</span> boolean references = false;<a name="line.395"></a> +<span class="sourceLineNo">396</span> HTableDescriptor parentDescriptor = getTableDescriptor(parent.getTable());<a name="line.396"></a> +<span class="sourceLineNo">397</span> for (HColumnDescriptor family: parentDescriptor.getFamilies()) {<a name="line.397"></a> 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name="line.408"></a> +<span class="sourceLineNo">409</span><a name="line.409"></a> +<span class="sourceLineNo">410</span> /**<a name="line.410"></a> +<span class="sourceLineNo">411</span> * Checks if the specified region has merge qualifiers, if so, try to clean<a name="line.411"></a> +<span class="sourceLineNo">412</span> * them<a name="line.412"></a> +<span class="sourceLineNo">413</span> * @param region<a name="line.413"></a> +<span class="sourceLineNo">414</span> * @return true if the specified region doesn't have merge qualifier now<a name="line.414"></a> +<span class="sourceLineNo">415</span> * @throws IOException<a name="line.415"></a> +<span class="sourceLineNo">416</span> */<a name="line.416"></a> +<span class="sourceLineNo">417</span> public boolean cleanMergeQualifier(final HRegionInfo region)<a name="line.417"></a> +<span class="sourceLineNo">418</span> throws IOException {<a name="line.418"></a> +<span class="sourceLineNo">419</span> // Get merge regions if it is a merged region and already has merge<a name="line.419"></a> +<span class="sourceLineNo">420</span> // qualifier<a name="line.420"></a> +<span class="sourceLineNo">421</span> Pair<HRegionInfo, HRegionInfo> mergeRegions = MetaTableAccessor<a name="line.421"></a> +<span class="sourceLineNo">422</span> .getRegionsFromMergeQualifier(this.services.getConnection(),<a name="line.422"></a> +<span class="sourceLineNo">423</span> region.getRegionName());<a name="line.423"></a> +<span class="sourceLineNo">424</span> if (mergeRegions == null<a name="line.424"></a> +<span class="sourceLineNo">425</span> || (mergeRegions.getFirst() == null && mergeRegions.getSecond() == null)) {<a name="line.425"></a> +<span class="sourceLineNo">426</span> // It doesn't have merge qualifier, no need to clean<a name="line.426"></a> +<span class="sourceLineNo">427</span> return true;<a name="line.427"></a> +<span class="sourceLineNo">428</span> }<a name="line.428"></a> +<span class="sourceLineNo">429</span> // It shouldn't 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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6a13df3e/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html index a0ca7d9..e2c4389 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.BatchOperationInProgress.html @@ -1283,7 +1283,7 @@ <span class="sourceLineNo">1275</span><a name="line.1275"></a> <span class="sourceLineNo">1276</span> @Override<a name="line.1276"></a> <span class="sourceLineNo">1277</span> public long getReadPoint(IsolationLevel isolationLevel) {<a name="line.1277"></a> -<span class="sourceLineNo">1278</span> if 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class="sourceLineNo">282</span>}<a name="line.282"></a> +<span class="sourceLineNo">169</span> long nextReadValue = NONE;<a name="line.169"></a> +<span class="sourceLineNo">170</span> boolean ranOnce = false;<a name="line.170"></a> +<span class="sourceLineNo">171</span> while (!writeQueue.isEmpty()) {<a name="line.171"></a> +<span class="sourceLineNo">172</span> ranOnce = true;<a name="line.172"></a> +<span class="sourceLineNo">173</span> WriteEntry queueFirst = writeQueue.getFirst();<a name="line.173"></a> +<span class="sourceLineNo">174</span><a name="line.174"></a> +<span class="sourceLineNo">175</span> if (nextReadValue > 0) {<a name="line.175"></a> +<span class="sourceLineNo">176</span> if (nextReadValue + 1 != queueFirst.getWriteNumber()) {<a name="line.176"></a> +<span class="sourceLineNo">177</span> throw new RuntimeException("Invariant in complete violated, nextReadValue="<a name="line.177"></a> +<span class="sourceLineNo">178</span> + nextReadValue + ", writeNumber=" + queueFirst.getWriteNumber());<a name="line.178"></a> +<span class="sourceLineNo">179</span> }<a name="line.179"></a> +<span class="sourceLineNo">180</span> }<a name="line.180"></a> +<span class="sourceLineNo">181</span><a name="line.181"></a> +<span class="sourceLineNo">182</span> if (queueFirst.isCompleted()) {<a name="line.182"></a> +<span class="sourceLineNo">183</span> nextReadValue = queueFirst.getWriteNumber();<a name="line.183"></a> +<span class="sourceLineNo">184</span> writeQueue.removeFirst();<a name="line.184"></a> +<span class="sourceLineNo">185</span> } else {<a name="line.185"></a> +<span class="sourceLineNo">186</span> break;<a name="line.186"></a> +<span class="sourceLineNo">187</span> }<a name="line.187"></a> +<span class="sourceLineNo">188</span> }<a name="line.188"></a> +<span class="sourceLineNo">189</span><a name="line.189"></a> +<span class="sourceLineNo">190</span> if (!ranOnce) {<a name="line.190"></a> +<span class="sourceLineNo">191</span> throw new RuntimeException("There is no first!");<a name="line.191"></a> +<span class="sourceLineNo">192</span> }<a name="line.192"></a> +<span class="sourceLineNo">193</span><a name="line.193"></a> +<span class="sourceLineNo">194</span> if (nextReadValue > 0) {<a name="line.194"></a> +<span class="sourceLineNo">195</span> synchronized (readWaiters) {<a name="line.195"></a> +<span class="sourceLineNo">196</span> readPoint.set(nextReadValue);<a name="line.196"></a> +<span class="sourceLineNo">197</span> readWaiters.notifyAll();<a name="line.197"></a> +<span class="sourceLineNo">198</span> }<a name="line.198"></a> +<span class="sourceLineNo">199</span> }<a name="line.199"></a> +<span class="sourceLineNo">200</span> return readPoint.get() >= writeEntry.getWriteNumber();<a name="line.200"></a> +<span class="sourceLineNo">201</span> }<a name="line.201"></a> +<span class="sourceLineNo">202</span> }<a name="line.202"></a> +<span class="sourceLineNo">203</span><a name="line.203"></a> +<span class="sourceLineNo">204</span> /**<a name="line.204"></a> +<span class="sourceLineNo">205</span> * Wait for the global readPoint to advance up to the passed in write entry number.<a name="line.205"></a> +<span class="sourceLineNo">206</span> */<a name="line.206"></a> +<span class="sourceLineNo">207</span> void waitForRead(WriteEntry e) {<a name="line.207"></a> +<span class="sourceLineNo">208</span> boolean interrupted = false;<a name="line.208"></a> +<span class="sourceLineNo">209</span> int count = 0;<a name="line.209"></a> +<span class="sourceLineNo">210</span> synchronized (readWaiters) {<a name="line.210"></a> +<span class="sourceLineNo">211</span> while (readPoint.get() < e.getWriteNumber()) {<a name="line.211"></a> +<span class="sourceLineNo">212</span> if (count % 100 == 0 && count > 0) {<a name="line.212"></a> +<span class="sourceLineNo">213</span> LOG.warn("STUCK: " + this);<a name="line.213"></a> +<span class="sourceLineNo">214</span> }<a name="line.214"></a> +<span class="sourceLineNo">215</span> count++;<a name="line.215"></a> +<span class="sourceLineNo">216</span> try {<a name="line.216"></a> +<span class="sourceLineNo">217</span> readWaiters.wait(10);<a name="line.217"></a> +<span class="sourceLineNo">218</span> } catch (InterruptedException ie) {<a name="line.218"></a> +<span class="sourceLineNo">219</span> // We were interrupted... finish the loop -- i.e. cleanup --and then<a name="line.219"></a> +<span class="sourceLineNo">220</span> // on our way out, reset the interrupt flag.<a name="line.220"></a> +<span class="sourceLineNo">221</span> interrupted = true;<a name="line.221"></a> +<span class="sourceLineNo">222</span> }<a name="line.222"></a> +<span class="sourceLineNo">223</span> }<a name="line.223"></a> +<span class="sourceLineNo">224</span> }<a name="line.224"></a> +<span class="sourceLineNo">225</span> if (interrupted) {<a name="line.225"></a> +<span class="sourceLineNo">226</span> Thread.currentThread().interrupt();<a name="line.226"></a> +<span class="sourceLineNo">227</span> }<a name="line.227"></a> +<span class="sourceLineNo">228</span> }<a name="line.228"></a> +<span class="sourceLineNo">229</span><a name="line.229"></a> +<span class="sourceLineNo">230</span> @VisibleForTesting<a name="line.230"></a> +<span class="sourceLineNo">231</span> public String toString() {<a name="line.231"></a> +<span class="sourceLineNo">232</span> return Objects.toStringHelper(this)<a name="line.232"></a> +<span class="sourceLineNo">233</span> .add("readPoint", readPoint)<a name="line.233"></a> +<span class="sourceLineNo">234</span> .add("writePoint", writePoint).toString();<a name="line.234"></a> +<span class="sourceLineNo">235</span> }<a name="line.235"></a> +<span class="sourceLineNo">236</span><a name="line.236"></a> +<span class="sourceLineNo">237</span> public long getReadPoint() {<a name="line.237"></a> +<span class="sourceLineNo">238</span> return readPoint.get();<a name="line.238"></a> +<span 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@InterfaceAudience.Private<a name="line.250"></a> +<span class="sourceLineNo">251</span> public static class WriteEntry {<a name="line.251"></a> +<span class="sourceLineNo">252</span> private final long writeNumber;<a name="line.252"></a> +<span class="sourceLineNo">253</span> private boolean completed = false;<a name="line.253"></a> +<span class="sourceLineNo">254</span><a name="line.254"></a> +<span class="sourceLineNo">255</span> WriteEntry(long writeNumber) {<a name="line.255"></a> +<span class="sourceLineNo">256</span> this.writeNumber = writeNumber;<a name="line.256"></a> +<span class="sourceLineNo">257</span> }<a name="line.257"></a> +<span class="sourceLineNo">258</span><a name="line.258"></a> +<span class="sourceLineNo">259</span> void markCompleted() {<a name="line.259"></a> +<span class="sourceLineNo">260</span> this.completed = true;<a name="line.260"></a> +<span class="sourceLineNo">261</span> }<a name="line.261"></a> +<span class="sourceLineNo">262</span><a name="line.262"></a> +<span class="sourceLineNo">263</span> boolean isCompleted() {<a name="line.263"></a> +<span class="sourceLineNo">264</span> return this.completed;<a name="line.264"></a> +<span class="sourceLineNo">265</span> }<a name="line.265"></a> +<span class="sourceLineNo">266</span><a name="line.266"></a> +<span class="sourceLineNo">267</span> public long getWriteNumber() {<a name="line.267"></a> +<span class="sourceLineNo">268</span> return this.writeNumber;<a name="line.268"></a> +<span class="sourceLineNo">269</span> }<a name="line.269"></a> +<span class="sourceLineNo">270</span><a name="line.270"></a> +<span class="sourceLineNo">271</span> @Override<a name="line.271"></a> +<span class="sourceLineNo">272</span> public String toString() {<a name="line.272"></a> +<span class="sourceLineNo">273</span> return this.writeNumber + ", " + this.completed;<a name="line.273"></a> +<span class="sourceLineNo">274</span> }<a name="line.274"></a> +<span class="sourceLineNo">275</span> 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