http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d1341859/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.html index f1a6dfa..e0f7285 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.html @@ -416,735 +416,730 @@ <span class="sourceLineNo">408</span> this.blocksize = WALUtil.getWALBlockSize(this.conf, this.fs, this.walDir);<a name="line.408"></a> <span class="sourceLineNo">409</span> float multiplier = conf.getFloat("hbase.regionserver.logroll.multiplier", 0.5f);<a name="line.409"></a> <span class="sourceLineNo">410</span> this.logrollsize = (long)(this.blocksize * multiplier);<a name="line.410"></a> -<span class="sourceLineNo">411</span><a name="line.411"></a> -<span class="sourceLineNo">412</span> boolean maxLogsDefined = conf.get("hbase.regionserver.maxlogs") != null;<a name="line.412"></a> -<span class="sourceLineNo">413</span> if (maxLogsDefined) {<a name="line.413"></a> -<span class="sourceLineNo">414</span> LOG.warn("'hbase.regionserver.maxlogs' was deprecated.");<a name="line.414"></a> -<span class="sourceLineNo">415</span> }<a name="line.415"></a> -<span class="sourceLineNo">416</span> this.maxLogs = conf.getInt("hbase.regionserver.maxlogs",<a name="line.416"></a> -<span class="sourceLineNo">417</span> Math.max(32, calculateMaxLogFiles(conf, logrollsize)));<a name="line.417"></a> -<span class="sourceLineNo">418</span><a name="line.418"></a> -<span class="sourceLineNo">419</span> LOG.info("WAL configuration: blocksize=" + StringUtils.byteDesc(blocksize) + ", rollsize=" +<a name="line.419"></a> -<span class="sourceLineNo">420</span> StringUtils.byteDesc(this.logrollsize) + ", prefix=" + this.walFilePrefix + ", suffix=" +<a name="line.420"></a> -<span class="sourceLineNo">421</span> walFileSuffix + ", logDir=" + this.walDir + ", archiveDir=" + this.walArchiveDir);<a name="line.421"></a> -<span class="sourceLineNo">422</span> this.slowSyncNs = TimeUnit.MILLISECONDS<a name="line.422"></a> -<span class="sourceLineNo">423</span> .toNanos(conf.getInt("hbase.regionserver.hlog.slowsync.ms", DEFAULT_SLOW_SYNC_TIME_MS));<a name="line.423"></a> -<span class="sourceLineNo">424</span> this.walSyncTimeoutNs = TimeUnit.MILLISECONDS<a name="line.424"></a> -<span class="sourceLineNo">425</span> .toNanos(conf.getLong("hbase.regionserver.hlog.sync.timeout", DEFAULT_WAL_SYNC_TIMEOUT_MS));<a name="line.425"></a> -<span class="sourceLineNo">426</span> this.cachedSyncFutures = new ThreadLocal<SyncFuture>() {<a name="line.426"></a> -<span class="sourceLineNo">427</span> @Override<a name="line.427"></a> -<span class="sourceLineNo">428</span> protected SyncFuture initialValue() {<a name="line.428"></a> -<span class="sourceLineNo">429</span> return new SyncFuture();<a name="line.429"></a> -<span class="sourceLineNo">430</span> }<a name="line.430"></a> -<span class="sourceLineNo">431</span> };<a name="line.431"></a> -<span class="sourceLineNo">432</span> this.implClassName = getClass().getSimpleName();<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> * Used to initialize the WAL. Usually just call rollWriter to create the first log writer.<a name="line.436"></a> -<span class="sourceLineNo">437</span> */<a name="line.437"></a> -<span class="sourceLineNo">438</span> public void init() throws IOException {<a name="line.438"></a> -<span class="sourceLineNo">439</span> rollWriter();<a name="line.439"></a> +<span class="sourceLineNo">411</span> this.maxLogs = conf.getInt("hbase.regionserver.maxlogs",<a name="line.411"></a> +<span class="sourceLineNo">412</span> Math.max(32, calculateMaxLogFiles(conf, logrollsize)));<a name="line.412"></a> +<span class="sourceLineNo">413</span><a name="line.413"></a> +<span class="sourceLineNo">414</span> LOG.info("WAL configuration: blocksize=" + StringUtils.byteDesc(blocksize) + ", rollsize=" +<a name="line.414"></a> +<span class="sourceLineNo">415</span> StringUtils.byteDesc(this.logrollsize) + ", prefix=" + this.walFilePrefix + ", suffix=" +<a name="line.415"></a> +<span class="sourceLineNo">416</span> walFileSuffix + ", logDir=" + this.walDir + ", archiveDir=" + this.walArchiveDir);<a name="line.416"></a> +<span class="sourceLineNo">417</span> this.slowSyncNs = TimeUnit.MILLISECONDS<a name="line.417"></a> +<span class="sourceLineNo">418</span> .toNanos(conf.getInt("hbase.regionserver.hlog.slowsync.ms", DEFAULT_SLOW_SYNC_TIME_MS));<a name="line.418"></a> +<span class="sourceLineNo">419</span> this.walSyncTimeoutNs = TimeUnit.MILLISECONDS<a name="line.419"></a> +<span class="sourceLineNo">420</span> .toNanos(conf.getLong("hbase.regionserver.hlog.sync.timeout", DEFAULT_WAL_SYNC_TIMEOUT_MS));<a name="line.420"></a> +<span class="sourceLineNo">421</span> this.cachedSyncFutures = new ThreadLocal<SyncFuture>() {<a name="line.421"></a> +<span class="sourceLineNo">422</span> @Override<a name="line.422"></a> +<span class="sourceLineNo">423</span> protected SyncFuture initialValue() {<a name="line.423"></a> +<span class="sourceLineNo">424</span> return new SyncFuture();<a name="line.424"></a> +<span class="sourceLineNo">425</span> }<a name="line.425"></a> +<span class="sourceLineNo">426</span> };<a name="line.426"></a> +<span class="sourceLineNo">427</span> this.implClassName = getClass().getSimpleName();<a name="line.427"></a> +<span class="sourceLineNo">428</span> }<a name="line.428"></a> +<span class="sourceLineNo">429</span><a name="line.429"></a> +<span class="sourceLineNo">430</span> /**<a name="line.430"></a> +<span class="sourceLineNo">431</span> * Used to initialize the WAL. Usually just call rollWriter to create the first log writer.<a name="line.431"></a> +<span class="sourceLineNo">432</span> */<a name="line.432"></a> +<span class="sourceLineNo">433</span> public void init() throws IOException {<a name="line.433"></a> +<span class="sourceLineNo">434</span> rollWriter();<a name="line.434"></a> +<span class="sourceLineNo">435</span> }<a name="line.435"></a> +<span class="sourceLineNo">436</span><a name="line.436"></a> +<span class="sourceLineNo">437</span> @Override<a name="line.437"></a> +<span class="sourceLineNo">438</span> public void registerWALActionsListener(WALActionsListener listener) {<a name="line.438"></a> +<span class="sourceLineNo">439</span> this.listeners.add(listener);<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> @Override<a name="line.442"></a> -<span class="sourceLineNo">443</span> public void registerWALActionsListener(WALActionsListener listener) {<a name="line.443"></a> -<span class="sourceLineNo">444</span> this.listeners.add(listener);<a name="line.444"></a> +<span class="sourceLineNo">443</span> public boolean unregisterWALActionsListener(WALActionsListener listener) {<a name="line.443"></a> +<span class="sourceLineNo">444</span> return this.listeners.remove(listener);<a name="line.444"></a> <span class="sourceLineNo">445</span> }<a name="line.445"></a> <span class="sourceLineNo">446</span><a name="line.446"></a> <span class="sourceLineNo">447</span> @Override<a name="line.447"></a> -<span class="sourceLineNo">448</span> public boolean unregisterWALActionsListener(WALActionsListener listener) {<a name="line.448"></a> -<span class="sourceLineNo">449</span> return this.listeners.remove(listener);<a name="line.449"></a> +<span class="sourceLineNo">448</span> public WALCoprocessorHost getCoprocessorHost() {<a name="line.448"></a> +<span class="sourceLineNo">449</span> return coprocessorHost;<a name="line.449"></a> <span class="sourceLineNo">450</span> }<a name="line.450"></a> <span class="sourceLineNo">451</span><a name="line.451"></a> <span class="sourceLineNo">452</span> @Override<a name="line.452"></a> -<span class="sourceLineNo">453</span> public WALCoprocessorHost getCoprocessorHost() {<a name="line.453"></a> -<span class="sourceLineNo">454</span> return coprocessorHost;<a name="line.454"></a> +<span class="sourceLineNo">453</span> public Long startCacheFlush(byte[] encodedRegionName, Set<byte[]> families) {<a name="line.453"></a> +<span class="sourceLineNo">454</span> return this.sequenceIdAccounting.startCacheFlush(encodedRegionName, families);<a name="line.454"></a> <span class="sourceLineNo">455</span> }<a name="line.455"></a> <span class="sourceLineNo">456</span><a name="line.456"></a> <span class="sourceLineNo">457</span> @Override<a name="line.457"></a> -<span class="sourceLineNo">458</span> public Long startCacheFlush(byte[] encodedRegionName, Set<byte[]> families) {<a name="line.458"></a> -<span class="sourceLineNo">459</span> return this.sequenceIdAccounting.startCacheFlush(encodedRegionName, families);<a name="line.459"></a> +<span class="sourceLineNo">458</span> public Long startCacheFlush(byte[] encodedRegionName, Map<byte[], Long> familyToSeq) {<a name="line.458"></a> +<span class="sourceLineNo">459</span> return this.sequenceIdAccounting.startCacheFlush(encodedRegionName, familyToSeq);<a name="line.459"></a> <span class="sourceLineNo">460</span> }<a name="line.460"></a> <span class="sourceLineNo">461</span><a name="line.461"></a> <span class="sourceLineNo">462</span> @Override<a name="line.462"></a> -<span class="sourceLineNo">463</span> public Long startCacheFlush(byte[] encodedRegionName, Map<byte[], Long> familyToSeq) {<a name="line.463"></a> -<span class="sourceLineNo">464</span> return this.sequenceIdAccounting.startCacheFlush(encodedRegionName, familyToSeq);<a name="line.464"></a> +<span class="sourceLineNo">463</span> public void completeCacheFlush(byte[] encodedRegionName) {<a name="line.463"></a> +<span class="sourceLineNo">464</span> this.sequenceIdAccounting.completeCacheFlush(encodedRegionName);<a name="line.464"></a> <span class="sourceLineNo">465</span> }<a name="line.465"></a> <span class="sourceLineNo">466</span><a name="line.466"></a> <span class="sourceLineNo">467</span> @Override<a name="line.467"></a> -<span class="sourceLineNo">468</span> public void completeCacheFlush(byte[] encodedRegionName) {<a name="line.468"></a> -<span class="sourceLineNo">469</span> this.sequenceIdAccounting.completeCacheFlush(encodedRegionName);<a name="line.469"></a> +<span class="sourceLineNo">468</span> public void abortCacheFlush(byte[] encodedRegionName) {<a name="line.468"></a> +<span class="sourceLineNo">469</span> this.sequenceIdAccounting.abortCacheFlush(encodedRegionName);<a name="line.469"></a> <span class="sourceLineNo">470</span> }<a name="line.470"></a> <span class="sourceLineNo">471</span><a name="line.471"></a> <span class="sourceLineNo">472</span> @Override<a name="line.472"></a> -<span class="sourceLineNo">473</span> public void abortCacheFlush(byte[] encodedRegionName) {<a name="line.473"></a> -<span class="sourceLineNo">474</span> this.sequenceIdAccounting.abortCacheFlush(encodedRegionName);<a name="line.474"></a> -<span class="sourceLineNo">475</span> }<a name="line.475"></a> -<span class="sourceLineNo">476</span><a name="line.476"></a> -<span class="sourceLineNo">477</span> @Override<a name="line.477"></a> -<span class="sourceLineNo">478</span> public long getEarliestMemStoreSeqNum(byte[] encodedRegionName) {<a name="line.478"></a> -<span class="sourceLineNo">479</span> // Used by tests. Deprecated as too subtle for general usage.<a name="line.479"></a> -<span class="sourceLineNo">480</span> return this.sequenceIdAccounting.getLowestSequenceId(encodedRegionName);<a name="line.480"></a> -<span class="sourceLineNo">481</span> }<a name="line.481"></a> -<span class="sourceLineNo">482</span><a name="line.482"></a> -<span class="sourceLineNo">483</span> @Override<a name="line.483"></a> -<span class="sourceLineNo">484</span> public long getEarliestMemStoreSeqNum(byte[] encodedRegionName, byte[] familyName) {<a name="line.484"></a> -<span class="sourceLineNo">485</span> // This method is used by tests and for figuring if we should flush or not because our<a name="line.485"></a> -<span class="sourceLineNo">486</span> // sequenceids are too old. 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This may mean we do too much flushing.<a name="line.492"></a> -<span class="sourceLineNo">493</span> return this.sequenceIdAccounting.getLowestSequenceId(encodedRegionName, familyName);<a name="line.493"></a> +<span class="sourceLineNo">473</span> public long getEarliestMemStoreSeqNum(byte[] encodedRegionName) {<a name="line.473"></a> +<span class="sourceLineNo">474</span> // Used by tests. Deprecated as too subtle for general usage.<a name="line.474"></a> +<span class="sourceLineNo">475</span> return this.sequenceIdAccounting.getLowestSequenceId(encodedRegionName);<a name="line.475"></a> +<span class="sourceLineNo">476</span> }<a name="line.476"></a> +<span class="sourceLineNo">477</span><a name="line.477"></a> +<span class="sourceLineNo">478</span> @Override<a name="line.478"></a> +<span class="sourceLineNo">479</span> public long getEarliestMemStoreSeqNum(byte[] encodedRegionName, byte[] familyName) {<a name="line.479"></a> +<span class="sourceLineNo">480</span> // This method is used by tests and for figuring if we should flush or not because our<a name="line.480"></a> +<span class="sourceLineNo">481</span> // sequenceids are too old. 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This may mean we do too much flushing.<a name="line.487"></a> +<span class="sourceLineNo">488</span> return this.sequenceIdAccounting.getLowestSequenceId(encodedRegionName, familyName);<a name="line.488"></a> +<span class="sourceLineNo">489</span> }<a name="line.489"></a> +<span class="sourceLineNo">490</span><a name="line.490"></a> +<span class="sourceLineNo">491</span> @Override<a name="line.491"></a> +<span class="sourceLineNo">492</span> public byte[][] rollWriter() throws FailedLogCloseException, IOException {<a name="line.492"></a> +<span class="sourceLineNo">493</span> return rollWriter(false);<a name="line.493"></a> <span class="sourceLineNo">494</span> }<a name="line.494"></a> <span class="sourceLineNo">495</span><a name="line.495"></a> -<span class="sourceLineNo">496</span> @Override<a name="line.496"></a> -<span class="sourceLineNo">497</span> public byte[][] rollWriter() throws FailedLogCloseException, IOException {<a name="line.497"></a> -<span class="sourceLineNo">498</span> return rollWriter(false);<a name="line.498"></a> -<span class="sourceLineNo">499</span> }<a name="line.499"></a> -<span class="sourceLineNo">500</span><a name="line.500"></a> -<span class="sourceLineNo">501</span> /**<a name="line.501"></a> -<span class="sourceLineNo">502</span> * This is a convenience method that computes a new filename with a given file-number.<a name="line.502"></a> -<span class="sourceLineNo">503</span> * @param filenum to use<a name="line.503"></a> -<span class="sourceLineNo">504</span> * @return Path<a name="line.504"></a> -<span class="sourceLineNo">505</span> */<a name="line.505"></a> -<span class="sourceLineNo">506</span> protected Path computeFilename(final long filenum) {<a name="line.506"></a> -<span class="sourceLineNo">507</span> if (filenum < 0) {<a name="line.507"></a> -<span class="sourceLineNo">508</span> throw new RuntimeException("WAL file number can't be < 0");<a name="line.508"></a> -<span class="sourceLineNo">509</span> }<a name="line.509"></a> -<span class="sourceLineNo">510</span> String child = walFilePrefix + WAL_FILE_NAME_DELIMITER + filenum + walFileSuffix;<a name="line.510"></a> -<span class="sourceLineNo">511</span> return new Path(walDir, child);<a name="line.511"></a> -<span class="sourceLineNo">512</span> }<a name="line.512"></a> -<span class="sourceLineNo">513</span><a name="line.513"></a> -<span class="sourceLineNo">514</span> /**<a name="line.514"></a> -<span class="sourceLineNo">515</span> * This is a convenience method that computes a new filename with a given using the current WAL<a name="line.515"></a> -<span class="sourceLineNo">516</span> * file-number<a name="line.516"></a> -<span class="sourceLineNo">517</span> * @return Path<a name="line.517"></a> -<span class="sourceLineNo">518</span> */<a name="line.518"></a> -<span class="sourceLineNo">519</span> public Path getCurrentFileName() {<a name="line.519"></a> -<span class="sourceLineNo">520</span> return computeFilename(this.filenum.get());<a name="line.520"></a> -<span class="sourceLineNo">521</span> }<a name="line.521"></a> -<span class="sourceLineNo">522</span><a name="line.522"></a> -<span class="sourceLineNo">523</span> /**<a name="line.523"></a> -<span class="sourceLineNo">524</span> * retrieve the next path to use for writing. Increments the internal filenum.<a name="line.524"></a> -<span class="sourceLineNo">525</span> */<a name="line.525"></a> -<span class="sourceLineNo">526</span> private Path getNewPath() throws IOException {<a name="line.526"></a> -<span class="sourceLineNo">527</span> this.filenum.set(System.currentTimeMillis());<a name="line.527"></a> -<span class="sourceLineNo">528</span> Path newPath = getCurrentFileName();<a name="line.528"></a> -<span class="sourceLineNo">529</span> while (fs.exists(newPath)) {<a name="line.529"></a> -<span class="sourceLineNo">530</span> this.filenum.incrementAndGet();<a name="line.530"></a> -<span class="sourceLineNo">531</span> newPath = getCurrentFileName();<a name="line.531"></a> -<span class="sourceLineNo">532</span> }<a name="line.532"></a> -<span class="sourceLineNo">533</span> return newPath;<a name="line.533"></a> -<span class="sourceLineNo">534</span> }<a name="line.534"></a> -<span class="sourceLineNo">535</span><a name="line.535"></a> -<span class="sourceLineNo">536</span> @VisibleForTesting<a name="line.536"></a> -<span class="sourceLineNo">537</span> Path getOldPath() {<a name="line.537"></a> -<span class="sourceLineNo">538</span> long currentFilenum = this.filenum.get();<a name="line.538"></a> -<span class="sourceLineNo">539</span> Path oldPath = null;<a name="line.539"></a> -<span class="sourceLineNo">540</span> if (currentFilenum > 0) {<a name="line.540"></a> -<span class="sourceLineNo">541</span> // ComputeFilename will take care of meta wal filename<a name="line.541"></a> -<span class="sourceLineNo">542</span> oldPath = computeFilename(currentFilenum);<a name="line.542"></a> -<span class="sourceLineNo">543</span> } // I presume if currentFilenum is <= 0, this is first file and null for oldPath if fine?<a name="line.543"></a> -<span class="sourceLineNo">544</span> return oldPath;<a name="line.544"></a> -<span class="sourceLineNo">545</span> }<a name="line.545"></a> -<span class="sourceLineNo">546</span><a name="line.546"></a> -<span class="sourceLineNo">547</span> /**<a name="line.547"></a> -<span class="sourceLineNo">548</span> * Tell listeners about pre log roll.<a name="line.548"></a> -<span class="sourceLineNo">549</span> */<a name="line.549"></a> -<span class="sourceLineNo">550</span> private void tellListenersAboutPreLogRoll(final Path oldPath, final Path newPath)<a name="line.550"></a> -<span class="sourceLineNo">551</span> throws IOException {<a name="line.551"></a> -<span class="sourceLineNo">552</span> coprocessorHost.preWALRoll(oldPath, newPath);<a name="line.552"></a> -<span class="sourceLineNo">553</span><a name="line.553"></a> -<span class="sourceLineNo">554</span> if (!this.listeners.isEmpty()) {<a name="line.554"></a> -<span class="sourceLineNo">555</span> for (WALActionsListener i : this.listeners) {<a name="line.555"></a> -<span class="sourceLineNo">556</span> i.preLogRoll(oldPath, newPath);<a name="line.556"></a> -<span class="sourceLineNo">557</span> }<a name="line.557"></a> -<span class="sourceLineNo">558</span> }<a name="line.558"></a> -<span class="sourceLineNo">559</span> }<a name="line.559"></a> -<span class="sourceLineNo">560</span><a name="line.560"></a> -<span class="sourceLineNo">561</span> /**<a name="line.561"></a> -<span class="sourceLineNo">562</span> * Tell listeners about post log roll.<a name="line.562"></a> -<span class="sourceLineNo">563</span> */<a name="line.563"></a> -<span class="sourceLineNo">564</span> private void tellListenersAboutPostLogRoll(final Path oldPath, final Path newPath)<a name="line.564"></a> -<span class="sourceLineNo">565</span> throws IOException {<a name="line.565"></a> -<span class="sourceLineNo">566</span> if (!this.listeners.isEmpty()) {<a name="line.566"></a> -<span class="sourceLineNo">567</span> for (WALActionsListener i : this.listeners) {<a name="line.567"></a> -<span class="sourceLineNo">568</span> i.postLogRoll(oldPath, newPath);<a name="line.568"></a> -<span class="sourceLineNo">569</span> }<a name="line.569"></a> -<span class="sourceLineNo">570</span> }<a name="line.570"></a> -<span class="sourceLineNo">571</span><a name="line.571"></a> -<span class="sourceLineNo">572</span> coprocessorHost.postWALRoll(oldPath, newPath);<a name="line.572"></a> -<span class="sourceLineNo">573</span> }<a name="line.573"></a> -<span class="sourceLineNo">574</span><a name="line.574"></a> -<span class="sourceLineNo">575</span> // public only until class moves to o.a.h.h.wal<a name="line.575"></a> -<span class="sourceLineNo">576</span> /** @return the number of rolled log files */<a name="line.576"></a> -<span class="sourceLineNo">577</span> public int getNumRolledLogFiles() {<a name="line.577"></a> -<span class="sourceLineNo">578</span> return walFile2Props.size();<a name="line.578"></a> -<span class="sourceLineNo">579</span> }<a name="line.579"></a> -<span class="sourceLineNo">580</span><a name="line.580"></a> -<span class="sourceLineNo">581</span> // public only until class moves to o.a.h.h.wal<a name="line.581"></a> -<span class="sourceLineNo">582</span> /** @return the number of log files in use */<a name="line.582"></a> -<span class="sourceLineNo">583</span> public int getNumLogFiles() {<a name="line.583"></a> -<span class="sourceLineNo">584</span> // +1 for current use log<a name="line.584"></a> -<span class="sourceLineNo">585</span> return getNumRolledLogFiles() + 1;<a name="line.585"></a> -<span class="sourceLineNo">586</span> }<a name="line.586"></a> -<span class="sourceLineNo">587</span><a name="line.587"></a> -<span class="sourceLineNo">588</span> /**<a name="line.588"></a> -<span class="sourceLineNo">589</span> * If the number of un-archived WAL files is greater than maximum allowed, check the first<a name="line.589"></a> -<span class="sourceLineNo">590</span> * (oldest) WAL file, and returns those regions which should be flushed so that it can be<a name="line.590"></a> -<span class="sourceLineNo">591</span> * archived.<a name="line.591"></a> -<span class="sourceLineNo">592</span> * @return regions (encodedRegionNames) to flush in order to archive oldest WAL file.<a name="line.592"></a> -<span class="sourceLineNo">593</span> */<a name="line.593"></a> -<span class="sourceLineNo">594</span> byte[][] findRegionsToForceFlush() throws IOException {<a name="line.594"></a> -<span class="sourceLineNo">595</span> byte[][] regions = null;<a name="line.595"></a> -<span class="sourceLineNo">596</span> int logCount = getNumRolledLogFiles();<a name="line.596"></a> -<span class="sourceLineNo">597</span> if (logCount > this.maxLogs && logCount > 0) {<a name="line.597"></a> -<span class="sourceLineNo">598</span> Map.Entry<Path, WalProps> firstWALEntry = this.walFile2Props.firstEntry();<a name="line.598"></a> -<span class="sourceLineNo">599</span> regions =<a name="line.599"></a> -<span class="sourceLineNo">600</span> this.sequenceIdAccounting.findLower(firstWALEntry.getValue().encodedName2HighestSequenceId);<a 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sb.toString());<a name="line.611"></a> -<span class="sourceLineNo">612</span> }<a name="line.612"></a> -<span class="sourceLineNo">613</span> return regions;<a name="line.613"></a> -<span class="sourceLineNo">614</span> }<a name="line.614"></a> -<span class="sourceLineNo">615</span><a name="line.615"></a> -<span class="sourceLineNo">616</span> /**<a name="line.616"></a> -<span class="sourceLineNo">617</span> * Archive old logs. 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i.postLogArchive(p, newPath);<a name="line.668"></a> -<span class="sourceLineNo">669</span> }<a name="line.669"></a> -<span class="sourceLineNo">670</span> }<a name="line.670"></a> -<span class="sourceLineNo">671</span> }<a name="line.671"></a> -<span class="sourceLineNo">672</span><a name="line.672"></a> -<span class="sourceLineNo">673</span> protected final void logRollAndSetupWalProps(Path oldPath, Path newPath, long oldFileLen) {<a name="line.673"></a> -<span class="sourceLineNo">674</span> int oldNumEntries = this.numEntries.getAndSet(0);<a name="line.674"></a> -<span class="sourceLineNo">675</span> String newPathString = newPath != null ? 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TraceUtil.createTrace("FSHLog.rollWriter")) {<a name="line.763"></a> -<span class="sourceLineNo">764</span> Path oldPath = getOldPath();<a name="line.764"></a> -<span class="sourceLineNo">765</span> Path newPath = getNewPath();<a name="line.765"></a> -<span class="sourceLineNo">766</span> // Any exception from here on is catastrophic, non-recoverable so we currently abort.<a name="line.766"></a> -<span class="sourceLineNo">767</span> W nextWriter = this.createWriterInstance(newPath);<a name="line.767"></a> -<span class="sourceLineNo">768</span> tellListenersAboutPreLogRoll(oldPath, newPath);<a name="line.768"></a> -<span class="sourceLineNo">769</span> // NewPath could be equal to oldPath if replaceWriter fails.<a name="line.769"></a> -<span class="sourceLineNo">770</span> newPath = replaceWriter(oldPath, newPath, nextWriter);<a name="line.770"></a> -<span class="sourceLineNo">771</span> tellListenersAboutPostLogRoll(oldPath, newPath);<a name="line.771"></a> -<span 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getCurrentFileName() {<a name="line.514"></a> +<span class="sourceLineNo">515</span> return computeFilename(this.filenum.get());<a name="line.515"></a> +<span class="sourceLineNo">516</span> }<a name="line.516"></a> +<span class="sourceLineNo">517</span><a name="line.517"></a> +<span class="sourceLineNo">518</span> /**<a name="line.518"></a> +<span class="sourceLineNo">519</span> * retrieve the next path to use for writing. Increments the internal filenum.<a name="line.519"></a> +<span class="sourceLineNo">520</span> */<a name="line.520"></a> +<span class="sourceLineNo">521</span> private Path getNewPath() throws IOException {<a name="line.521"></a> +<span class="sourceLineNo">522</span> this.filenum.set(System.currentTimeMillis());<a name="line.522"></a> +<span class="sourceLineNo">523</span> Path newPath = getCurrentFileName();<a name="line.523"></a> +<span class="sourceLineNo">524</span> while (fs.exists(newPath)) {<a name="line.524"></a> +<span class="sourceLineNo">525</span> this.filenum.incrementAndGet();<a name="line.525"></a> +<span class="sourceLineNo">526</span> newPath = getCurrentFileName();<a name="line.526"></a> +<span class="sourceLineNo">527</span> }<a name="line.527"></a> +<span class="sourceLineNo">528</span> return newPath;<a name="line.528"></a> +<span class="sourceLineNo">529</span> }<a name="line.529"></a> +<span class="sourceLineNo">530</span><a name="line.530"></a> +<span class="sourceLineNo">531</span> @VisibleForTesting<a name="line.531"></a> +<span class="sourceLineNo">532</span> Path getOldPath() {<a name="line.532"></a> +<span class="sourceLineNo">533</span> long currentFilenum = this.filenum.get();<a name="line.533"></a> +<span class="sourceLineNo">534</span> Path oldPath = null;<a name="line.534"></a> +<span class="sourceLineNo">535</span> if (currentFilenum > 0) {<a name="line.535"></a> +<span class="sourceLineNo">536</span> // ComputeFilename will take care of meta wal filename<a name="line.536"></a> +<span class="sourceLineNo">537</span> oldPath = computeFilename(currentFilenum);<a name="line.537"></a> +<span class="sourceLineNo">538</span> } // I presume if currentFilenum is <= 0, this is first file and null for oldPath if fine?<a name="line.538"></a> +<span class="sourceLineNo">539</span> return oldPath;<a name="line.539"></a> +<span class="sourceLineNo">540</span> }<a name="line.540"></a> +<span class="sourceLineNo">541</span><a name="line.541"></a> +<span class="sourceLineNo">542</span> /**<a name="line.542"></a> +<span class="sourceLineNo">543</span> * Tell listeners about pre log roll.<a name="line.543"></a> +<span class="sourceLineNo">544</span> */<a name="line.544"></a> +<span class="sourceLineNo">545</span> private void tellListenersAboutPreLogRoll(final Path oldPath, final Path newPath)<a name="line.545"></a> +<span class="sourceLineNo">546</span> throws IOException {<a name="line.546"></a> +<span class="sourceLineNo">547</span> coprocessorHost.preWALRoll(oldPath, newPath);<a name="line.547"></a> +<span class="sourceLineNo">548</span><a name="line.548"></a> +<span class="sourceLineNo">549</span> if (!this.listeners.isEmpty()) {<a name="line.549"></a> +<span class="sourceLineNo">550</span> for (WALActionsListener i : this.listeners) {<a name="line.550"></a> +<span class="sourceLineNo">551</span> i.preLogRoll(oldPath, newPath);<a name="line.551"></a> +<span class="sourceLineNo">552</span> }<a name="line.552"></a> +<span class="sourceLineNo">553</span> }<a name="line.553"></a> +<span class="sourceLineNo">554</span> }<a name="line.554"></a> +<span class="sourceLineNo">555</span><a name="line.555"></a> +<span class="sourceLineNo">556</span> /**<a name="line.556"></a> +<span class="sourceLineNo">557</span> * Tell listeners about post log roll.<a name="line.557"></a> +<span class="sourceLineNo">558</span> */<a name="line.558"></a> +<span class="sourceLineNo">559</span> private void tellListenersAboutPostLogRoll(final Path oldPath, final Path newPath)<a name="line.559"></a> +<span class="sourceLineNo">560</span> throws IOException {<a name="line.560"></a> +<span class="sourceLineNo">561</span> if (!this.listeners.isEmpty()) {<a name="line.561"></a> +<span class="sourceLineNo">562</span> for (WALActionsListener i : this.listeners) {<a name="line.562"></a> +<span class="sourceLineNo">563</span> i.postLogRoll(oldPath, newPath);<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><a name="line.566"></a> +<span class="sourceLineNo">567</span> coprocessorHost.postWALRoll(oldPath, newPath);<a name="line.567"></a> +<span class="sourceLineNo">568</span> }<a name="line.568"></a> +<span class="sourceLineNo">569</span><a name="line.569"></a> +<span class="sourceLineNo">570</span> // public only until class moves to o.a.h.h.wal<a name="line.570"></a> +<span class="sourceLineNo">571</span> /** @return the number of rolled log files */<a name="line.571"></a> +<span class="sourceLineNo">572</span> public int getNumRolledLogFiles() {<a name="line.572"></a> +<span class="sourceLineNo">573</span> return walFile2Props.size();<a name="line.573"></a> +<span class="sourceLineNo">574</span> }<a name="line.574"></a> +<span class="sourceLineNo">575</span><a name="line.575"></a> +<span class="sourceLineNo">576</span> // public only until class moves to o.a.h.h.wal<a name="line.576"></a> +<span class="sourceLineNo">577</span> /** @return the number of log files in use */<a name="line.577"></a> +<span class="sourceLineNo">578</span> public int getNumLogFiles() {<a name="line.578"></a> +<span class="sourceLineNo">579</span> // +1 for current use log<a name="line.579"></a> +<span class="sourceLineNo">580</span> return getNumRolledLogFiles() + 1;<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> +<span class="sourceLineNo">584</span> * If the number of un-archived WAL files is greater than maximum allowed, check the first<a name="line.584"></a> +<span class="sourceLineNo">585</span> * (oldest) WAL file, and returns those regions which should be flushed so that it can be<a name="line.585"></a> +<span class="sourceLineNo">586</span> * archived.<a name="line.586"></a> +<span class="sourceLineNo">587</span> * @return regions (encodedRegionNames) to flush in order to archive oldest WAL file.<a name="line.587"></a> +<span class="sourceLineNo">588</span> */<a name="line.588"></a> +<span class="sourceLineNo">589</span> byte[][] findRegionsToForceFlush() throws IOException {<a name="line.589"></a> +<span class="sourceLineNo">590</span> byte[][] regions = null;<a name="line.590"></a> +<span class="sourceLineNo">591</span> int logCount = getNumRolledLogFiles();<a name="line.591"></a> +<span class="sourceLineNo">592</span> if (logCount > this.maxLogs && logCount > 0) {<a name="line.592"></a> +<span class="sourceLineNo">593</span> Map.Entry<Path, WalProps> firstWALEntry = this.walFile2Props.firstEntry();<a name="line.593"></a> +<span class="sourceLineNo">594</span> regions =<a name="line.594"></a> +<span class="sourceLineNo">595</span> this.sequenceIdAccounting.findLower(firstWALEntry.getValue().encodedName2HighestSequenceId);<a name="line.595"></a> +<span class="sourceLineNo">596</span> }<a name="line.596"></a> +<span class="sourceLineNo">597</span> if (regions != null) {<a name="line.597"></a> +<span class="sourceLineNo">598</span> StringBuilder sb = new StringBuilder();<a name="line.598"></a> +<span class="sourceLineNo">599</span> for (int i = 0; i < regions.length; i++) {<a name="line.599"></a> +<span class="sourceLineNo">600</span> if (i > 0) {<a name="line.600"></a> +<span class="sourceLineNo">601</span> sb.append(", ");<a name="line.601"></a> +<span class="sourceLineNo">602</span> }<a name="line.602"></a> +<span class="sourceLineNo">603</span> sb.append(Bytes.toStringBinary(regions[i]));<a name="line.603"></a> +<span class="sourceLineNo">604</span> }<a name="line.604"></a> +<span class="sourceLineNo">605</span> LOG.info("Too many WALs; count=" + logCount + ", max=" + this.maxLogs +<a name="line.605"></a> +<span class="sourceLineNo">606</span> "; forcing flush of " + regions.length + " regions(s): " + sb.toString());<a name="line.606"></a> +<span class="sourceLineNo">607</span> }<a name="line.607"></a> +<span class="sourceLineNo">608</span> return regions;<a name="line.608"></a> +<span class="sourceLineNo">609</span> }<a name="line.609"></a> +<span class="sourceLineNo">610</span><a name="line.610"></a> +<span class="sourceLineNo">611</span> /**<a name="line.611"></a> +<span class="sourceLineNo">612</span> * Archive old logs. A WAL is eligible for archiving if all its WALEdits have been flushed.<a name="line.612"></a> +<span class="sourceLineNo">613</span> */<a name="line.613"></a> +<span class="sourceLineNo">614</span> private void cleanOldLogs() throws IOException {<a name="line.614"></a> +<span class="sourceLineNo">615</span> List<Pair<Path, Long>> logsToArchive = null;<a name="line.615"></a> +<span class="sourceLineNo">616</span> // For each log file, look at its Map of regions to highest sequence id; if all sequence ids<a name="line.616"></a> +<span class="sourceLineNo">617</span> // are older than what is currently in memory, the WAL can be GC'd.<a name="line.617"></a> +<span class="sourceLineNo">618</span> for (Map.Entry<Path, WalProps> e : this.walFile2Props.entrySet()) {<a name="line.618"></a> +<span class="sourceLineNo">619</span> Path log = e.getKey();<a name="line.619"></a> +<span class="sourceLineNo">620</span> Map<byte[], Long> sequenceNums = e.getValue().encodedName2HighestSequenceId;<a name="line.620"></a> +<span class="sourceLineNo">621</span> if (this.sequenceIdAccounting.areAllLower(sequenceNums)) {<a name="line.621"></a> +<span class="sourceLineNo">622</span> if (logsToArchive == null) {<a name="line.622"></a> +<span class="sourceLineNo">623</span> logsToArchive = new ArrayList<>();<a name="line.623"></a> +<span class="sourceLineNo">624</span> }<a name="line.624"></a> +<span class="sourceLineNo">625</span> logsToArchive.add(Pair.newPair(log, e.getValue().logSize));<a name="line.625"></a> +<span class="sourceLineNo">626</span> if (LOG.isTraceEnabled()) {<a name="line.626"></a> +<span class="sourceLineNo">627</span> LOG.trace("WAL file ready for archiving " + log);<a name="line.627"></a> +<span class="sourceLineNo">628</span> }<a name="line.628"></a> +<span class="sourceLineNo">629</span> }<a name="line.629"></a> +<span class="sourceLineNo">630</span> }<a name="line.630"></a> +<span class="sourceLineNo">631</span> if (logsToArchive != null) {<a name="line.631"></a> +<span class="sourceLineNo">632</span> for (Pair<Path, Long> logAndSize : logsToArchive) {<a name="line.632"></a> +<span class="sourceLineNo">633</span> this.totalLogSize.addAndGet(-logAndSize.getSecond());<a name="line.633"></a> +<span class="sourceLineNo">634</span> archiveLogFile(logAndSize.getFirst());<a name="line.634"></a> +<span class="sourceLineNo">635</span> this.walFile2Props.remove(logAndSize.getFirst());<a name="line.635"></a> +<span class="sourceLineNo">636</span> }<a name="line.636"></a> +<span class="sourceLineNo">637</span> }<a name="line.637"></a> +<span class="sourceLineNo">638</span> }<a name="line.638"></a> +<span class="sourceLineNo">639</span><a name="line.639"></a> +<span class="sourceLineNo">640</span> /*<a name="line.640"></a> +<span class="sourceLineNo">641</span> * only public so WALSplitter can use.<a name="line.641"></a> +<span class="sourceLineNo">642</span> * @return archived location of a WAL file with the given path p<a name="line.642"></a> +<span class="sourceLineNo">643</span> */<a name="line.643"></a> +<span class="sourceLineNo">644</span> public static Path getWALArchivePath(Path archiveDir, Path p) {<a name="line.644"></a> +<span class="sourceLineNo">645</span> return new Path(archiveDir, p.getName());<a name="line.645"></a> +<span class="sourceLineNo">646</span> }<a name="line.646"></a> +<span class="sourceLineNo">647</span><a name="line.647"></a> +<span class="sourceLineNo">648</span> private void archiveLogFile(final Path p) throws IOException {<a name="line.648"></a> +<span class="sourceLineNo">649</span> Path newPath = getWALArchivePath(this.walArchiveDir, p);<a name="line.649"></a> +<span class="sourceLineNo">650</span> // Tell our listeners that a log is going to be archived.<a name="line.650"></a> +<span class="sourceLineNo">651</span> if (!this.listeners.isEmpty()) {<a name="line.651"></a> +<span class="sourceLineNo">652</span> for (WALActionsListener i : this.listeners) {<a name="line.652"></a> +<span class="sourceLineNo">653</span> i.preLogArchive(p, newPath);<a name="line.653"></a> +<span class="sourceLineNo">654</span> }<a name="line.654"></a> +<span class="sourceLineNo">655</span> }<a name="line.655"></a> +<span class="sourceLineNo">656</span> LOG.info("Archiving " + p + " to " + newPath);<a name="line.656"></a> +<span class="sourceLineNo">657</span> if (!CommonFSUtils.renameAndSetModifyTime(this.fs, p, newPath)) {<a name="line.657"></a> +<span class="sourceLineNo">658</span> throw new IOException("Unable to rename " + p + " to " + newPath);<a name="line.658"></a> +<span class="sourceLineNo">659</span> }<a name="line.659"></a> +<span class="sourceLineNo">660</span> // Tell our listeners that a log has been archived.<a name="line.660"></a> +<span class="sourceLineNo">661</span> if (!this.listeners.isEmpty()) {<a name="line.661"></a> +<span class="sourceLineNo">662</span> for (WALActionsListener i : this.listeners) {<a name="line.662"></a> +<span class="sourceLineNo">663</span> i.postLogArchive(p, newPath);<a name="line.663"></a> +<span class="sourceLineNo">664</span> }<a name="line.664"></a> +<span class="sourceLineNo">665</span> }<a name="line.665"></a> +<span class="sourceLineNo">666</span> }<a name="line.666"></a> +<span class="sourceLineNo">667</span><a name="line.667"></a> +<span class="sourceLineNo">668</span> protected final void logRollAndSetupWalProps(Path oldPath, Path newPath, long oldFileLen) {<a name="line.668"></a> +<span class="sourceLineNo">669</span> int oldNumEntries = this.numEntries.getAndSet(0);<a name="line.669"></a> +<span class="sourceLineNo">670</span> String newPathString = newPath != null ? CommonFSUtils.getPath(newPath) : null;<a name="line.670"></a> +<span class="sourceLineNo">671</span> if (oldPath != null) {<a name="line.671"></a> +<span class="sourceLineNo">672</span> this.walFile2Props.put(oldPath,<a name="line.672"></a> +<span class="sourceLineNo">673</span> new WalProps(this.sequenceIdAccounting.resetHighest(), oldFileLen));<a name="line.673"></a> +<span class="sourceLineNo">674</span> this.totalLogSize.addAndGet(oldFileLen);<a name="line.674"></a> +<span class="sourceLineNo">675</span> LOG.info("Rolled WAL {} with entries={}, filesize={}; new WAL {}",<a name="line.675"></a> +<span class="sourceLineNo">676</span> CommonFSUtils.getPath(oldPath), oldNumEntries, StringUtils.byteDesc(oldFileLen),<a name="line.676"></a> +<span class="sourceLineNo">677</span> newPathString);<a name="line.677"></a> +<span class="sourceLineNo">678</span> } else {<a name="line.678"></a> +<span class="sourceLineNo">679</span> LOG.info("New WAL {}", newPathString);<a name="line.679"></a> +<span class="sourceLineNo">680</span> }<a name="line.680"></a> +<span class="sourceLineNo">681</span> }<a name="line.681"></a> +<span class="sourceLineNo">682</span><a name="line.682"></a> +<span class="sourceLineNo">683</span> /**<a name="line.683"></a> +<span class="sourceLineNo">684</span> * <p><a name="line.684"></a> +<span class="sourceLineNo">685</span> * Cleans up current writer closing it and then puts in place the passed in<a name="line.685"></a> +<span class="sourceLineNo">686</span> * <code>nextWriter</code>.<a name="line.686"></a> +<span class="sourceLineNo">687</span> * </p><a name="line.687"></a> +<span class="sourceLineNo">688</span> * <p><a name="line.688"></a> +<span class="sourceLineNo">689</span> * <ul><a name="line.689"></a> +<span class="sourceLineNo">690</span> * <li>In the case of creating a new WAL, oldPath will be null.</li><a name="line.690"></a> +<span class="sourceLineNo">691</span> * <li>In the case of rolling over from one file to the next, none of the parameters will be null.<a name="line.691"></a> +<span class="sourceLineNo">692</span> * </li><a name="line.692"></a> +<span class="sourceLineNo">693</span> * <li>In the case of closing out this FSHLog with no further use newPath and nextWriter will be<a name="line.693"></a> +<span class="sourceLineNo">694</span> * null.</li><a name="line.694"></a> +<span class="sourceLineNo">695</span> * </ul><a name="line.695"></a> +<span class="sourceLineNo">696</span> * </p><a name="line.696"></a> +<span class="sourceLineNo">697</span> * @param oldPath may be null<a name="line.697"></a> +<span class="sourceLineNo">698</span> * @param newPath may be null<a name="line.698"></a> +<span class="sourceLineNo">699</span> * @param nextWriter may be null<a name="line.699"></a> +<span class="sourceLineNo">700</span> * @return the passed in <code>newPath</code><a name="line.700"></a> +<span class="sourceLineNo">701</span> * @throws IOException if there is a problem flushing or closing the underlying FS<a name="line.701"></a> +<span class="sourceLineNo">702</span> */<a name="line.702"></a> +<span class="sourceLineNo">703</span> @VisibleForTesting<a name="line.703"></a> +<span class="sourceLineNo">704</span> Path replaceWriter(Path oldPath, Path newPath, W nextWriter) throws IOException {<a name="line.704"></a> +<span class="sourceLineNo">705</span> try (TraceScope scope = TraceUtil.createTrace("FSHFile.replaceWriter")) {<a name="line.705"></a> +<span class="sourceLineNo">706</span> doReplaceWriter(oldPath, newPath, nextWriter);<a name="line.706"></a> +<span class="sourceLineNo">707</span> return newPath;<a name="line.707"></a> +<span class="sourceLineNo">708</span> }<a name="line.708"></a> +<span class="sourceLineNo">709</span> }<a name="line.709"></a> +<span class="sourceLineNo">710</span><a name="line.710"></a> +<span class="sourceLineNo">711</span> protected final void blockOnSync(SyncFuture syncFuture) throws IOException {<a name="line.711"></a> +<span class="sourceLineNo">712</span> // Now we have published the ringbuffer, halt the current thread until we get an answer back.<a name="line.712"></a> +<span class="sourceLineNo">713</span> try {<a name="line.713"></a> +<span class="sourceLineNo">714</span> if (syncFuture != null) {<a name="line.714"></a> +<span class="sourceLineNo">715</span> if (closed) {<a name="line.715"></a> +<span class="sourceLineNo">716</span> throw new IOException("WAL has been closed");<a name="line.716"></a> +<span class="sourceLineNo">717</span> } else {<a name="line.717"></a> +<span class="sourceLineNo">718</span> syncFuture.get(walSyncTimeoutNs);<a name="line.718"></a> +<span class="sourceLineNo">719</span> }<a name="line.719"></a> +<span class="sourceLineNo">720</span> }<a name="line.720"></a> +<span class="sourceLineNo">721</span> } catch (TimeoutIOException tioe) {<a name="line.721"></a> +<span class="sourceLineNo">722</span> // SyncFuture reuse by thread, if TimeoutIOException happens, ringbuffer<a 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See RS log " + "for details.",<a name="line.785"></a> -<span class="sourceLineNo">786</span> exception);<a name="line.786"></a> -<span class="sourceLineNo">787</span> }<a name="line.787"></a> -<span class="sourceLineNo">788</span> return regionsToFlush;<a name="line.788"></a> -<span class="sourceLineNo">789</span> } finally {<a name="line.789"></a> -<span class="sourceLineNo">790</span> rollWriterLock.unlock();<a name="line.790"></a> -<span class="sourceLineNo">791</span> }<a name="line.791"></a> -<span class="sourceLineNo">792</span> }<a name="line.792"></a> -<span class="sourceLineNo">793</span><a name="line.793"></a> -<span class="sourceLineNo">794</span> // public only until class moves to o.a.h.h.wal<a name="line.794"></a> -<span class="sourceLineNo">795</span> /** @return the size of log files in use */<a name="line.795"></a> -<span class="sourceLineNo">796</span> public long getLogFileSize() {<a name="line.796"></a> -<span class="sourceLineNo">797</span> return this.totalLogSize.get();<a name="line.797"></a> +<span class="sourceLineNo">776</span> } catch (CommonFSUtils.StreamLacksCapabilityException exception) {<a name="line.776"></a> +<span class="sourceLineNo">777</span> // If the underlying FileSystem can't do what we ask, treat as IO failure so<a name="line.777"></a> +<span class="sourceLineNo">778</span> // we'll abort.<a name="line.778"></a> +<span class="sourceLineNo">779</span> throw new IOException(<a name="line.779"></a> +<span class="sourceLineNo">780</span> "Underlying FileSystem can't meet stream requirements. 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<TRUNCATED>
