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CountDownLatch是什么？

CountDownLatch是Java中一个同步工具类，用于控制多个线程的执行顺序。它可以让某个线程一直等待，直到其他线程完成各自的操作后再继续执行。CountDownLatch通过一个计数器来实现，计数器的初始值为线程数量，每当一个线程完成任务后，计数器的值就会减1，当计数器的值变为0时，等待的线程就会被唤醒继续执行...

开发笔记 ·2024-03-19

PHP has encountered an Access Violation

解决方法：回收进程池...

开发笔记 ·2023-08-11

ORA-48149: error encountered when attempting to copy a file

文档解释ORA-48149:errorencounteredwhenattemptingtocopyafileCause:TherewasanerrorencounteredwhenattemptingtocopyafilewiththeADRfileinterface.Action:Checkthedirectory...

IT技术学习 ·2023-07-28

ORA-64110: XMLIndex: problems encountered during the gathering of statistics

文档解释ORA-64110:XMLIndex:problemsencounteredduringthegatheringofstatisticsCause:Seeassociatederrormessage.Action:Correcttheerrorandretrycommand.ORA-64110是Oracle数据...

IT技术学习 ·2023-07-28

ORA-29705: ACTIVE_INSTANCE_COUNT is string which is incompatible with the value in other instances

文档解释ORA-29705:ACTIVE_INSTANCE_COUNTisstringwhichisincompatiblewiththevalueinotherinstancesCause:ThevalueoftheACTIVE_INSTANCE_COUNTparametermustbethesameinallOra...

IT技术学习 ·2023-07-28

ORA-48117: error encountered when attempting to remove a directory [string]

文档解释ORA-48117:errorencounteredwhenattemptingtoremoveadirectory[string]Cause:Therewasanerrorencounteredwhenattemptingtoremoveadirectory.Action:Checkthedirectoryn...

IT技术学习 ·2023-07-28

ORA-48324: Incompatible staging file encountered

文档解释ORA-48324:IncompatiblestagingfileencounteredCause:sweepincidentfailedbecausestagingfileisincompatibleAction:checktheincidentIDandversionofADRandretry。ORA-48...

IT技术学习 ·2023-07-28

ORA-48938: View select column count differs from select alias list

文档解释ORA-48938:ViewselectcolumncountdiffersfromselectaliaslistCause:Theviewaliaslisthasadifferentnumberoffieldsthantheselectlist”Action:Changethealiaslisto...

IT技术学习 ·2023-07-28

ORA-14309: Total count of list values exceeds maximum allowed

文档解释ORA-14309:TotalcountoflistvaluesexceedsmaximumallowedCause:Partitionedobjectcontainsmorethan524288listvaluesAction:Reducenumberofvaluestolessthan524288.ORA-...

IT技术学习 ·2023-07-27

ORA-19630: end of volume encountered while copying backup piece

文档解释ORA-19630:endofvolumeencounteredwhilecopyingbackuppieceCause:WhilecopyingabackuppiecefromtheOSnativefilesystemtoanoutputdevice,theoutputdeviceencounteredend...

IT技术学习 ·2023-07-26

ORA-13546: Error encountered during maintenance of Adaptive Thresholds

文档解释ORA-13546:ErrorencounteredduringmaintenanceofAdaptiveThresholdsCause:ErroroccurredduringOCIoperationduetounderlyingerror.Action:CheckassociatedOCIerror.Corr...

IT技术学习 ·2023-07-26

ORA-13157: Oracle error ORAstring encountered while string

文档解释ORA-13157:OracleerrorORAstringencounteredwhilestringCause:ThespecifiedOracleerrorwasencountered.Action:CorrecttheOracleerror.。ORA-13157:OracleerrorORA13157表...

IT技术学习 ·2023-07-26

ORA-19609: string is from different backup set: stamp string count string

文档解释ORA-19609:stringisfromdifferentbackupset:stampstringcountstringCause:Thespecifiedfileisnotfromthebackupsetwhichiscurrentlybeingprocessed.Itispartofadifferen...

IT技术学习 ·2023-07-26

ORA-48123: error encountered when attempting to flush a file

文档解释ORA-48123:errorencounteredwhenattemptingtoflushafileCause:TherewasanerrorencounteredwhenattemptingtoflushafilewiththeADRfileinterface.Action:Checkthestateof...

IT技术学习 ·2023-07-26

ORA-48124: device full encountered during write to a file

文档解释ORA-48124:devicefullencounteredduringwritetoafileCause:Thedevicefullerrorwasencounteredduringthewritetoafile.Action:Checktheamountoffreespaceonthedevice.ORA...

IT技术学习 ·2023-07-26