http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6eb695c8/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactingMemStore.InMemoryFlushRunnable.html
----------------------------------------------------------------------
diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactingMemStore.InMemoryFlushRunnable.html
b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactingMemStore.InMemoryFlushRunnable.html
index 807ed6b..3dbdec3 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactingMemStore.InMemoryFlushRunnable.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactingMemStore.InMemoryFlushRunnable.html
@@ -206,392 +206,389 @@
<span class="sourceLineNo">198</span> LOG.warn("Snapshot called again
without clearing previous. " +<a name="line.198"></a>
<span class="sourceLineNo">199</span> "Doing nothing. Another ongoing
flush or did we fail last attempt?");<a name="line.199"></a>
<span class="sourceLineNo">200</span> } else {<a name="line.200"></a>
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name="line.201"></a>
-<span class="sourceLineNo">202</span> LOG.debug("FLUSHING TO DISK:
region "<a name="line.202"></a>
-<span class="sourceLineNo">203</span> +
getRegionServices().getRegionInfo().getRegionNameAsString() + "store: "<a
name="line.203"></a>
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name="line.204"></a>
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MemStoreSnapshot(snapshotId, this.snapshot);<a name="line.217"></a>
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-<span class="sourceLineNo">219</span><a name="line.219"></a>
-<span class="sourceLineNo">220</span> /**<a name="line.220"></a>
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name="line.243"></a>
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name="line.255"></a>
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getRegionServices().getRegionInfo().getEncodedNameAsBytes();<a
name="line.264"></a>
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getFamilyNameInBytes();<a name="line.265"></a>
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getRegionServices().getWAL();<a name="line.266"></a>
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name="line.267"></a>
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WAL.updateStore(encodedRegionName, familyName, minSequenceId, onlyIfGreater);<a
name="line.268"></a>
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MemStore that next coming updates<a name="line.274"></a>
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replaying edits from WAL<a name="line.275"></a>
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MemStore that the replaying edits from WAL<a name="line.283"></a>
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name="line.292"></a>
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getSegments() {<a name="line.294"></a>
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ArrayList<>(pipelineList.size() + 2);<a name="line.296"></a>
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name="line.297"></a>
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name="line.298"></a>
-<span class="sourceLineNo">299</span>
list.addAll(this.snapshot.getAllSegments());<a name="line.299"></a>
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store={}",<a name="line.201"></a>
+<span class="sourceLineNo">202</span>
getRegionServices().getRegionInfo().getEncodedName(), getFamilyName());<a
name="line.202"></a>
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name="line.203"></a>
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pushActiveToPipeline(this.active);<a name="line.204"></a>
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name="line.212"></a>
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MemStoreSnapshot(snapshotId, this.snapshot);<a name="line.214"></a>
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snapshotSizing.incMemStoreSize(active.getMemStoreSize());<a name="line.228"></a>
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MemStoreSize(active.getMemStoreSize());<a name="line.234"></a>
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name="line.238"></a>
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+<span class="sourceLineNo">240</span> long k = this.active.keySize();<a
name="line.240"></a>
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name="line.250"></a>
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name="line.289"></a>
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getSegments() {<a name="line.291"></a>
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pipelineList = pipeline.getSegments();<a name="line.292"></a>
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ArrayList<>(pipelineList.size() + 2);<a name="line.293"></a>
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name="line.294"></a>
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list.addAll(this.snapshot.getAllSegments());<a name="line.296"></a>
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this.active.keySize();<a name="line.579"></a>
-<span class="sourceLineNo">580</span> msg += " in-memory flush size is "+
inmemoryFlushSize;<a name="line.580"></a>
-<span class="sourceLineNo">581</span> msg += " allow compaction is "+
(allowCompaction.get() ? "true" : "false");<a name="line.581"></a>
-<span class="sourceLineNo">582</span> msg += " inMemoryFlushInProgress is
"+ (inMemoryFlushInProgress.get() ? "true" : "false");<a name="line.582"></a>
-<span class="sourceLineNo">583</span> LOG.debug(msg);<a name="line.583"></a>
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-<span class="sourceLineNo">585</span><a name="line.585"></a>
-<span class="sourceLineNo">586</span>}<a name="line.586"></a>
+<span class="sourceLineNo">301</span> // the following three methods allow to
manipulate the settings of composite snapshot<a name="line.301"></a>
+<span class="sourceLineNo">302</span> public void
setCompositeSnapshot(boolean useCompositeSnapshot) {<a name="line.302"></a>
+<span class="sourceLineNo">303</span> this.compositeSnapshot =
useCompositeSnapshot;<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> public boolean
swapCompactedSegments(VersionedSegmentsList versionedList, ImmutableSegment
result,<a name="line.306"></a>
+<span class="sourceLineNo">307</span> boolean merge) {<a
name="line.307"></a>
+<span class="sourceLineNo">308</span> // last true stands for updating the
region size<a name="line.308"></a>
+<span class="sourceLineNo">309</span> return pipeline.swap(versionedList,
result, !merge, true);<a name="line.309"></a>
+<span class="sourceLineNo">310</span> }<a name="line.310"></a>
+<span class="sourceLineNo">311</span><a name="line.311"></a>
+<span class="sourceLineNo">312</span> /**<a name="line.312"></a>
+<span class="sourceLineNo">313</span> * @param requesterVersion The caller
must hold the VersionedList of the pipeline<a name="line.313"></a>
+<span class="sourceLineNo">314</span> * with version taken
earlier. This version must be passed as a parameter here.<a name="line.314"></a>
+<span class="sourceLineNo">315</span> * The flattening happens
only if versions match.<a name="line.315"></a>
+<span class="sourceLineNo">316</span> */<a name="line.316"></a>
+<span class="sourceLineNo">317</span> public void flattenOneSegment(long
requesterVersion, MemStoreCompactionStrategy.Action action) {<a
name="line.317"></a>
+<span class="sourceLineNo">318</span>
pipeline.flattenOneSegment(requesterVersion, indexType, action);<a
name="line.318"></a>
+<span class="sourceLineNo">319</span> }<a name="line.319"></a>
+<span class="sourceLineNo">320</span><a name="line.320"></a>
+<span class="sourceLineNo">321</span> // setter is used only for
testability<a name="line.321"></a>
+<span class="sourceLineNo">322</span> @VisibleForTesting<a
name="line.322"></a>
+<span class="sourceLineNo">323</span> void setIndexType(IndexType type) {<a
name="line.323"></a>
+<span class="sourceLineNo">324</span> indexType = type;<a
name="line.324"></a>
+<span class="sourceLineNo">325</span> // Because this functionality is for
testing only and tests are setting in-memory flush size<a name="line.325"></a>
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no setting of in-memory flush size, here.<a name="line.326"></a>
+<span class="sourceLineNo">327</span> // If it is needed, please change
in-memory flush size explicitly<a name="line.327"></a>
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+<span class="sourceLineNo">329</span><a name="line.329"></a>
+<span class="sourceLineNo">330</span> public IndexType getIndexType() {<a
name="line.330"></a>
+<span class="sourceLineNo">331</span> return indexType;<a
name="line.331"></a>
+<span class="sourceLineNo">332</span> }<a name="line.332"></a>
+<span class="sourceLineNo">333</span><a name="line.333"></a>
+<span class="sourceLineNo">334</span> public boolean hasImmutableSegments()
{<a name="line.334"></a>
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name="line.335"></a>
+<span class="sourceLineNo">336</span> }<a name="line.336"></a>
+<span class="sourceLineNo">337</span><a name="line.337"></a>
+<span class="sourceLineNo">338</span> public VersionedSegmentsList
getImmutableSegments() {<a name="line.338"></a>
+<span class="sourceLineNo">339</span> return pipeline.getVersionedList();<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> public long getSmallestReadPoint() {<a
name="line.342"></a>
+<span class="sourceLineNo">343</span> return
store.getSmallestReadPoint();<a name="line.343"></a>
+<span class="sourceLineNo">344</span> }<a name="line.344"></a>
+<span class="sourceLineNo">345</span><a name="line.345"></a>
+<span class="sourceLineNo">346</span> public HStore getStore() {<a
name="line.346"></a>
+<span class="sourceLineNo">347</span> return store;<a name="line.347"></a>
+<span class="sourceLineNo">348</span> }<a name="line.348"></a>
+<span class="sourceLineNo">349</span><a name="line.349"></a>
+<span class="sourceLineNo">350</span> public String getFamilyName() {<a
name="line.350"></a>
+<span class="sourceLineNo">351</span> return
Bytes.toString(getFamilyNameInBytes());<a name="line.351"></a>
+<span class="sourceLineNo">352</span> }<a name="line.352"></a>
+<span class="sourceLineNo">353</span><a name="line.353"></a>
+<span class="sourceLineNo">354</span> @Override<a name="line.354"></a>
+<span class="sourceLineNo">355</span> /*<a name="line.355"></a>
+<span class="sourceLineNo">356</span> * Scanners are ordered from 0 (oldest)
to newest in increasing order.<a name="line.356"></a>
+<span class="sourceLineNo">357</span> */<a name="line.357"></a>
+<span class="sourceLineNo">358</span> public List<KeyValueScanner>
getScanners(long readPt) throws IOException {<a name="line.358"></a>
+<span class="sourceLineNo">359</span> MutableSegment activeTmp = active;<a
name="line.359"></a>
+<span class="sourceLineNo">360</span> List<? extends Segment>
pipelineList = pipeline.getSegments();<a name="line.360"></a>
+<span class="sourceLineNo">361</span> List<? extends Segment>
snapshotList = snapshot.getAllSegments();<a name="line.361"></a>
+<span class="sourceLineNo">362</span> long order = 1L + pipelineList.size()
+ snapshotList.size();<a name="line.362"></a>
+<span class="sourceLineNo">363</span> // The list of elements in pipeline +
the active element + the snapshot segment<a name="line.363"></a>
+<span class="sourceLineNo">364</span> // The order is the Segment ordinal<a
name="line.364"></a>
+<span class="sourceLineNo">365</span> List<KeyValueScanner> list =
createList((int) order);<a name="line.365"></a>
+<span class="sourceLineNo">366</span> order = addToScanners(activeTmp,
readPt, order, list);<a name="line.366"></a>
+<span class="sourceLineNo">367</span> order = addToScanners(pipelineList,
readPt, order, list);<a name="line.367"></a>
+<span class="sourceLineNo">368</span> addToScanners(snapshotList, readPt,
order, list);<a name="line.368"></a>
+<span class="sourceLineNo">369</span> return list;<a name="line.369"></a>
+<span class="sourceLineNo">370</span> }<a name="line.370"></a>
+<span class="sourceLineNo">371</span><a name="line.371"></a>
+<span class="sourceLineNo">372</span> @VisibleForTesting<a
name="line.372"></a>
+<span class="sourceLineNo">373</span> protected List<KeyValueScanner>
createList(int capacity) {<a name="line.373"></a>
+<span class="sourceLineNo">374</span> return new
ArrayList<>(capacity);<a name="line.374"></a>
+<span class="sourceLineNo">375</span> }<a name="line.375"></a>
+<span class="sourceLineNo">376</span><a name="line.376"></a>
+<span class="sourceLineNo">377</span> /**<a name="line.377"></a>
+<span class="sourceLineNo">378</span> * Check whether anything need to be
done based on the current active set size.<a name="line.378"></a>
+<span class="sourceLineNo">379</span> * The method is invoked upon every
addition to the active set.<a name="line.379"></a>
+<span class="sourceLineNo">380</span> * For CompactingMemStore, flush the
active set to the read-only memory if it's<a name="line.380"></a>
+<span class="sourceLineNo">381</span> * size is above threshold<a
name="line.381"></a>
+<span class="sourceLineNo">382</span> */<a name="line.382"></a>
+<span class="sourceLineNo">383</span> @Override<a name="line.383"></a>
+<span class="sourceLineNo">384</span> protected void checkActiveSize() {<a
name="line.384"></a>
+<span class="sourceLineNo">385</span> if (shouldFlushInMemory()) {<a
name="line.385"></a>
+<span class="sourceLineNo">386</span> /* The thread is dispatched to
flush-in-memory. This cannot be done<a name="line.386"></a>
+<span class="sourceLineNo">387</span> * on the same thread, because for
flush-in-memory we require updatesLock<a name="line.387"></a>
+<span class="sourceLineNo">388</span> * in exclusive mode while this
method (checkActiveSize) is invoked holding updatesLock<a name="line.388"></a>
+<span class="sourceLineNo">389</span> * in the shared mode. */<a
name="line.389"></a>
+<span class="sourceLineNo">390</span> InMemoryFlushRunnable runnable =
new InMemoryFlushRunnable();<a name="line.390"></a>
+<span class="sourceLineNo">391</span> if (LOG.isTraceEnabled()) {<a
name="line.391"></a>
+<span class="sourceLineNo">392</span> LOG.trace(<a name="line.392"></a>
+<span class="sourceLineNo">393</span> "Dispatching the MemStore
in-memory flush for store " + store.getColumnFamilyName());<a
name="line.393"></a>
+<span class="sourceLineNo">394</span> }<a name="line.394"></a>
+<span class="sourceLineNo">395</span> getPool().execute(runnable);<a
name="line.395"></a>
+<span class="sourceLineNo">396</span> }<a name="line.396"></a>
+<span class="sourceLineNo">397</span> }<a name="line.397"></a>
+<span class="sourceLineNo">398</span><a name="line.398"></a>
+<span class="sourceLineNo">399</span> // internally used method, externally
visible only for tests<a name="line.399"></a>
+<span class="sourceLineNo">400</span> // when invoked directly from tests it
must be verified that the caller doesn't hold updatesLock,<a
name="line.400"></a>
+<span class="sourceLineNo">401</span> // otherwise there is a deadlock<a
name="line.401"></a>
+<span class="sourceLineNo">402</span> @VisibleForTesting<a
name="line.402"></a>
+<span class="sourceLineNo">403</span> void flushInMemory() throws IOException
{<a name="line.403"></a>
+<span class="sourceLineNo">404</span> // setting the
inMemoryFlushInProgress flag again for the case this method is invoked<a
name="line.404"></a>
+<span class="sourceLineNo">405</span> // directly (only in tests) in the
common path setting from true to true is idempotent<a name="line.405"></a>
+<span class="sourceLineNo">406</span> inMemoryFlushInProgress.set(true);<a
name="line.406"></a>
+<span class="sourceLineNo">407</span> try {<a name="line.407"></a>
+<span class="sourceLineNo">408</span> // Phase I: Update the pipeline<a
name="line.408"></a>
+<span class="sourceLineNo">409</span>
getRegionServices().blockUpdates();<a name="line.409"></a>
+<span class="sourceLineNo">410</span> try {<a name="line.410"></a>
+<span class="sourceLineNo">411</span> LOG.trace("IN-MEMORY FLUSH:
Pushing active segment into compaction pipeline");<a name="line.411"></a>
+<span class="sourceLineNo">412</span>
pushActiveToPipeline(this.active);<a name="line.412"></a>
+<span class="sourceLineNo">413</span> } finally {<a name="line.413"></a>
+<span class="sourceLineNo">414</span>
getRegionServices().unblockUpdates();<a name="line.414"></a>
+<span class="sourceLineNo">415</span> }<a name="line.415"></a>
+<span class="sourceLineNo">416</span><a name="line.416"></a>
+<span class="sourceLineNo">417</span> // Used by tests<a
name="line.417"></a>
+<span class="sourceLineNo">418</span> if (!allowCompaction.get()) {<a
name="line.418"></a>
+<span class="sourceLineNo">419</span> return;<a name="line.419"></a>
+<span class="sourceLineNo">420</span> }<a name="line.420"></a>
+<span class="sourceLineNo">421</span> // Phase II: Compact the pipeline<a
name="line.421"></a>
+<span class="sourceLineNo">422</span> try {<a name="line.422"></a>
+<span class="sourceLineNo">423</span> // Speculative compaction
execution, may be interrupted if flush is forced while<a name="line.423"></a>
+<span class="sourceLineNo">424</span> // compaction is in progress<a
name="line.424"></a>
+<span class="sourceLineNo">425</span> compactor.start();<a
name="line.425"></a>
+<span class="sourceLineNo">426</span> } catch (IOException e) {<a
name="line.426"></a>
+<span class="sourceLineNo">427</span> LOG.warn("Unable to run in-memory
compaction on {}/{}; exception={}",<a name="line.427"></a>
+<span class="sourceLineNo">428</span>
getRegionServices().getRegionInfo().getEncodedName(), getFamilyName(), e);<a
name="line.428"></a>
+<span class="sourceLineNo">429</span> }<a name="line.429"></a>
+<span class="sourceLineNo">430</span> } finally {<a name="line.430"></a>
+<span class="sourceLineNo">431</span>
inMemoryFlushInProgress.set(false);<a name="line.431"></a>
+<span class="sourceLineNo">432</span> LOG.trace("IN-MEMORY FLUSH:
end");<a name="line.432"></a>
+<span class="sourceLineNo">433</span> }<a name="line.433"></a>
+<span class="sourceLineNo">434</span> }<a name="line.434"></a>
+<span class="sourceLineNo">435</span><a name="line.435"></a>
+<span class="sourceLineNo">436</span> private Segment getLastSegment() {<a
name="line.436"></a>
+<span class="sourceLineNo">437</span> Segment localActive = getActive();<a
name="line.437"></a>
+<span class="sourceLineNo">438</span> Segment tail = pipeline.getTail();<a
name="line.438"></a>
+<span class="sourceLineNo">439</span> return tail == null ? localActive :
tail;<a name="line.439"></a>
+<span class="sourceLineNo">440</span> }<a name="line.440"></a>
+<span class="sourceLineNo">441</span><a name="line.441"></a>
+<span class="sourceLineNo">442</span> private byte[] getFamilyNameInBytes()
{<a name="line.442"></a>
+<span class="sourceLineNo">443</span> return
store.getColumnFamilyDescriptor().getName();<a name="line.443"></a>
+<span class="sourceLineNo">444</span> }<a name="line.444"></a>
+<span class="sourceLineNo">445</span><a name="line.445"></a>
+<span class="sourceLineNo">446</span> private ThreadPoolExecutor getPool()
{<a name="line.446"></a>
+<span class="sourceLineNo">447</span> return
getRegionServices().getInMemoryCompactionPool();<a name="line.447"></a>
+<span class="sourceLineNo">448</span> }<a name="line.448"></a>
+<span class="sourceLineNo">449</span><a name="line.449"></a>
+<span class="sourceLineNo">450</span> @VisibleForTesting<a
name="line.450"></a>
+<span class="sourceLineNo">451</span> protected boolean shouldFlushInMemory()
{<a name="line.451"></a>
+<span class="sourceLineNo">452</span> if (this.active.keySize() >
inmemoryFlushSize) { // size above flush threshold<a name="line.452"></a>
+<span class="sourceLineNo">453</span> if (inWalReplay) { // when
replaying edits from WAL there is no need in in-memory flush<a
name="line.453"></a>
+<span class="sourceLineNo">454</span> return false; // regardless
the size<a name="line.454"></a>
+<span class="sourceLineNo">455</span> }<a name="line.455"></a>
+<span class="sourceLineNo">456</span> // the inMemoryFlushInProgress is
CASed to be true here in order to mutual exclude<a name="line.456"></a>
+<span class="sourceLineNo">457</span> // the insert of the active into
the compaction pipeline<a name="line.457"></a>
+<span class="sourceLineNo">458</span> return
(inMemoryFlushInProgress.compareAndSet(false,true));<a name="line.458"></a>
+<span class="sourceLineNo">459</span> }<a name="line.459"></a>
+<span class="sourceLineNo">460</span> return false;<a name="line.460"></a>
+<span class="sourceLineNo">461</span> }<a name="line.461"></a>
+<span class="sourceLineNo">462</span><a name="line.462"></a>
+<span class="sourceLineNo">463</span> /**<a name="line.463"></a>
+<span class="sourceLineNo">464</span> * The request to cancel the compaction
asynchronous task (caused by in-memory flush)<a name="line.464"></a>
+<span class="sourceLineNo">465</span> * The compaction may still happen if
the request was sent too late<a name="line.465"></a>
+<span class="sourceLineNo">466</span> * Non-blocking request<a
name="line.466"></a>
+<span class="sourceLineNo">467</span> */<a name="line.467"></a>
+<span class="sourceLineNo">468</span> private void stopCompaction() {<a
name="line.468"></a>
+<span class="sourceLineNo">469</span> if (inMemoryFlushInProgress.get())
{<a name="line.469"></a>
+<span class="sourceLineNo">470</span> compactor.stop();<a
name="line.470"></a>
+<span class="sourceLineNo">471</span> }<a name="line.471"></a>
+<span class="sourceLineNo">472</span> }<a name="line.472"></a>
+<span class="sourceLineNo">473</span><a name="line.473"></a>
+<span class="sourceLineNo">474</span> protected void
pushActiveToPipeline(MutableSegment active) {<a name="line.474"></a>
+<span class="sourceLineNo">475</span> if (!active.isEmpty()) {<a
name="line.475"></a>
+<span class="sourceLineNo">476</span> pipeline.pushHead(active);<a
name="line.476"></a>
+<span class="sourceLineNo">477</span> resetActive();<a
name="line.477"></a>
+<span class="sourceLineNo">478</span> }<a name="line.478"></a>
+<span class="sourceLineNo">479</span> }<a name="line.479"></a>
+<span class="sourceLineNo">480</span><a name="line.480"></a>
+<span class="sourceLineNo">481</span> private void pushTailToSnapshot() {<a
name="line.481"></a>
+<span class="sourceLineNo">482</span> VersionedSegmentsList segments =
pipeline.getVersionedTail();<a name="line.482"></a>
+<span class="sourceLineNo">483</span>
pushToSnapshot(segments.getStoreSegments());<a name="line.483"></a>
+<span class="sourceLineNo">484</span> // In Swap: don't close segments
(they are in snapshot now) and don't update the region size<a
name="line.484"></a>
+<span class="sourceLineNo">485</span> pipeline.swap(segments,null,false,
false);<a name="line.485"></a>
+<span class="sourceLineNo">486</span> }<a name="line.486"></a>
+<span class="sourceLineNo">487</span><a name="line.487"></a>
+<span class="sourceLineNo">488</span> private void pushPipelineToSnapshot()
{<a name="line.488"></a>
+<span class="sourceLineNo">489</span> int iterationsCnt = 0;<a
name="line.489"></a>
+<span class="sourceLineNo">490</span> boolean done = false;<a
name="line.490"></a>
+<span class="sourceLineNo">491</span> while (!done) {<a name="line.491"></a>
+<span class="sourceLineNo">492</span> iterationsCnt++;<a
name="line.492"></a>
+<span class="sourceLineNo">493</span> VersionedSegmentsList segments =
pipeline.getVersionedList();<a name="line.493"></a>
+<span class="sourceLineNo">494</span>
pushToSnapshot(segments.getStoreSegments());<a name="line.494"></a>
+<span class="sourceLineNo">495</span> // swap can return false in case
the pipeline was updated by ongoing compaction<a name="line.495"></a>
+<span class="sourceLineNo">496</span> // and the version increase, the
chance of it happenning is very low<a name="line.496"></a>
+<span class="sourceLineNo">497</span> // In Swap: don't close segments
(they are in snapshot now) and don't update the region size<a
name="line.497"></a>
+<span class="sourceLineNo">498</span> done = pipeline.swap(segments,
null, false, false);<a name="line.498"></a>
+<span class="sourceLineNo">499</span> if (iterationsCnt>2) {<a
name="line.499"></a>
+<span class="sourceLineNo">500</span> // practically it is impossible
that this loop iterates more than two times<a name="line.500"></a>
+<span class="sourceLineNo">501</span> // (because the compaction is
stopped and none restarts it while in snapshot request),<a name="line.501"></a>
+<span class="sourceLineNo">502</span> // however stopping here for the
case of the infinite loop causing by any error<a name="line.502"></a>
+<span class="sourceLineNo">503</span> LOG.warn("Multiple unsuccessful
attempts to push the compaction pipeline to snapshot," +<a name="line.503"></a>
+<span class="sourceLineNo">504</span> " while flushing to
disk.");<a name="line.504"></a>
+<span class="sourceLineNo">505</span> this.snapshot =
SegmentFactory.instance().createImmutableSegment(getComparator());<a
name="line.505"></a>
+<span class="sourceLineNo">506</span> break;<a name="line.506"></a>
+<span class="sourceLineNo">507</span> }<a name="line.507"></a>
+<span class="sourceLineNo">508</span> }<a name="line.508"></a>
+<span class="sourceLineNo">509</span> }<a name="line.509"></a>
+<span class="sourceLineNo">510</span><a name="line.510"></a>
+<span class="sourceLineNo">511</span> private void
pushToSnapshot(List<ImmutableSegment> segments) {<a name="line.511"></a>
+<span class="sourceLineNo">512</span> if(segments.isEmpty()) return;<a
name="line.512"></a>
+<span class="sourceLineNo">513</span> if(segments.size() == 1 &&
!segments.get(0).isEmpty()) {<a name="line.513"></a>
+<span class="sourceLineNo">514</span> this.snapshot = segments.get(0);<a
name="line.514"></a>
+<span class="sourceLineNo">515</span> return;<a name="line.515"></a>
+<span class="sourceLineNo">516</span> } else { // create composite
snapshot<a name="line.516"></a>
+<span class="sourceLineNo">517</span> this.snapshot =<a
name="line.517"></a>
+<span class="sourceLineNo">518</span>
SegmentFactory.instance().createCompositeImmutableSegment(getComparator(),
segments);<a name="line.518"></a>
+<span class="sourceLineNo">519</span> }<a name="line.519"></a>
+<span class="sourceLineNo">520</span> }<a name="line.520"></a>
+<span class="sourceLineNo">521</span><a name="line.521"></a>
+<span class="sourceLineNo">522</span> private RegionServicesForStores
getRegionServices() {<a name="line.522"></a>
+<span class="sourceLineNo">523</span> return regionServices;<a
name="line.523"></a>
+<span class="sourceLineNo">524</span> }<a name="line.524"></a>
+<span class="sourceLineNo">525</span><a name="line.525"></a>
+<span class="sourceLineNo">526</span> /**<a name="line.526"></a>
+<span class="sourceLineNo">527</span> * The in-memory-flusher thread performs
the flush asynchronously.<a name="line.527"></a>
+<span class="sourceLineNo">528</span> * There is at most one thread per
memstore instance.<a name="line.528"></a>
+<span class="sourceLineNo">529</span> * It takes the updatesLock exclusively,
pushes active into the pipeline, releases updatesLock<a name="line.529"></a>
+<span class="sourceLineNo">530</span> * and compacts the pipeline.<a
name="line.530"></a>
+<span class="sourceLineNo">531</span> */<a name="line.531"></a>
+<span class="sourceLineNo">532</span> private class InMemoryFlushRunnable
implements Runnable {<a name="line.532"></a>
+<span class="sourceLineNo">533</span><a name="line.533"></a>
+<span class="sourceLineNo">534</span> @Override<a name="line.534"></a>
+<span class="sourceLineNo">535</span> public void run() {<a
name="line.535"></a>
+<span class="sourceLineNo">536</span> try {<a name="line.536"></a>
+<span class="sourceLineNo">537</span> flushInMemory();<a
name="line.537"></a>
+<span class="sourceLineNo">538</span> } catch (IOException e) {<a
name="line.538"></a>
+<span class="sourceLineNo">539</span> LOG.warn("Unable to run memstore
compaction. region "<a name="line.539"></a>
+<span class="sourceLineNo">540</span> +
getRegionServices().getRegionInfo().getRegionNameAsString()<a
name="line.540"></a>
+<span class="sourceLineNo">541</span> + "store: "+ getFamilyName(),
e);<a name="line.541"></a>
+<span class="sourceLineNo">542</span> }<a name="line.542"></a>
+<span class="sourceLineNo">543</span> }<a name="line.543"></a>
+<span class="sourceLineNo">544</span> }<a name="line.544"></a>
+<span class="sourceLineNo">545</span><a name="line.545"></a>
+<span class="sourceLineNo">546</span> @VisibleForTesting<a
name="line.546"></a>
+<span class="sourceLineNo">547</span> boolean isMemStoreFlushingInMemory()
{<a name="line.547"></a>
+<span class="sourceLineNo">548</span> return
inMemoryFlushInProgress.get();<a name="line.548"></a>
+<span class="sourceLineNo">549</span> }<a name="line.549"></a>
+<span class="sourceLineNo">550</span><a name="line.550"></a>
+<span class="sourceLineNo">551</span> /**<a name="line.551"></a>
+<span class="sourceLineNo">552</span> * @param cell Find the row that comes
after this one. If null, we return the<a name="line.552"></a>
+<span class="sourceLineNo">553</span> * first.<a
name="line.553"></a>
+<span class="sourceLineNo">554</span> * @return Next row or null if none
found.<a name="line.554"></a>
+<span class="sourceLineNo">555</span> */<a name="line.555"></a>
+<span class="sourceLineNo">556</span> Cell getNextRow(final Cell cell) {<a
name="line.556"></a>
+<span class="sourceLineNo">557</span> Cell lowest = null;<a
name="line.557"></a>
+<span class="sourceLineNo">558</span> List<Segment> segments =
getSegments();<a name="line.558"></a>
+<span class="sourceLineNo">559</span> for (Segment segment : segments) {<a
name="line.559"></a>
+<span class="sourceLineNo">560</span> if (lowest == null) {<a
name="line.560"></a>
+<span class="sourceLineNo">561</span> lowest = getNextRow(cell,
segment.getCellSet());<a name="line.561"></a>
+<span class="sourceLineNo">562</span> } else {<a name="line.562"></a>
+<span class="sourceLineNo">563</span> lowest = getLowest(lowest,
getNextRow(cell, segment.getCellSet()));<a name="line.563"></a>
+<span class="sourceLineNo">564</span> }<a name="line.564"></a>
+<span class="sourceLineNo">565</span> }<a name="line.565"></a>
+<span class="sourceLineNo">566</span> return lowest;<a name="line.566"></a>
+<span class="sourceLineNo">567</span> }<a name="line.567"></a>
+<span class="sourceLineNo">568</span><a name="line.568"></a>
+<span class="sourceLineNo">569</span> @VisibleForTesting<a
name="line.569"></a>
+<span class="sourceLineNo">570</span> long getInmemoryFlushSize() {<a
name="line.570"></a>
+<span class="sourceLineNo">571</span> return inmemoryFlushSize;<a
name="line.571"></a>
+<span class="sourceLineNo">572</span> }<a name="line.572"></a>
+<span class="sourceLineNo">573</span><a name="line.573"></a>
+<span class="sourceLineNo">574</span> // debug method<a name="line.574"></a>
+<span class="sourceLineNo">575</span> public void debug() {<a
name="line.575"></a>
+<span class="sourceLineNo">576</span> String msg = "active size=" +
this.active.keySize();<a name="line.576"></a>
+<span class="sourceLineNo">577</span> msg += " in-memory flush size is "+
inmemoryFlushSize;<a name="line.577"></a>
+<span class="sourceLineNo">578</span> msg += " allow compaction is "+
(allowCompaction.get() ? "true" : "false");<a name="line.578"></a>
+<span class="sourceLineNo">579</span> msg += " inMemoryFlushInProgress is
"+ (inMemoryFlushInProgress.get() ? "true" : "false");<a name="line.579"></a>
+<span class="sourceLineNo">580</span> LOG.debug(msg);<a name="line.580"></a>
+<span class="sourceLineNo">581</span> }<a name="line.581"></a>
+<span class="sourceLineNo">582</span><a name="line.582"></a>
+<span class="sourceLineNo">583</span>}<a name="line.583"></a>
