ubuntu 下使用 memcache ::delete() 报错解决方案

解决Memcache::delete()错误
本文介绍了解决Memcache::delete()函数在特定版本组合下出现“CLIENT_ERROR bad command line format”错误的方法。通过调整delete函数的参数,可以有效避免此问题。文章还提供了不同版本组合下该函数的工作状态。

ubuntu10.10 desktop,安装了memcached

delete 使用方式:


$mem = new Memcache; 

$mem->connect('127.0.0.1',11211); 

$mem->delete('key');

报错信息:

coinsight@insight-ubuntu:~$ php clear.php   PHP Notice:  MemcachePool::delete(): Server 127.0.0.1 (tcp 11211, udp 0) failed with: CLIENT_ERROR bad command line format.  Usage: delete <key> [noreply]  (0) in /home/coinsight/clear.php on line 4  coinsight@insight-ubuntu:~$ 


解决方案:在使用delete方法时,如:$memcache->delete('key', 0) 加个参数 可以设为0(0表示立即删除)  或者是其他一个数值 如10 表示10秒后删除


出错原因:

nibblebot at gmail dot com 09-Jul-2010 03:58 
the Memcache::delete(key) function is broken on several combinations of memcached+pecl-memcache combinations. 

pecl-memcache 2.2.5 + memcached 1.4.2 - Memcache::delete(key) WORKS

pecl-memcache 2.2.5 + memcached 1.4.3 - Memcache::delete(key) DOES NOT WORK

pecl-memcache 2.2.5 + memcached 1.4.4 - Memcache::delete(key) WORKS

pecl-memcache 2.2.5 + memcached 1.4.5 - Memcache::delete(key) WORKS

pecl-memcache 3.0.4 + memcached 1.4.2 - Memcache::delete(key) WORKS

pecl-memcache 3.0.4 + memcached 1.4.3 - Memcache::delete(key) DOES NOT WORK

pecl-memcache 3.0.4 + memcached 1.4.4 - Memcache::delete(key) DOES NOT WORK

pecl-memcache 3.0.4 + memcached 1.4.5 - Memcache::delete(key) DOES NOT WORK


运行后报错 D:\2025.9\Hadoop\test\4\jdk1.8\jdk1.8\jdk1.8.0_181\bin\java.exe "-javaagent:D:\2025.9\JAVA\IDEA 2023.1\IntelliJ IDEA 2023.1\lib\idea_rt.jar=2316:D:\2025.9\JAVA\IDEA 2023.1\IntelliJ IDEA 2023.1\bin" -Dfile.encoding=UTF-8 -classpath 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WordCount 2025-10-30 01:07:39,629 WARN [main] util.Shell (Shell.java:<clinit>(692)) - Did not find winutils.exe: {} java.io.FileNotFoundException: java.io.FileNotFoundException: Hadoop home directory D:\hadoop does not exist -see https://wiki.apache.org/hadoop/WindowsProblems at org.apache.hadoop.util.Shell.fileNotFoundException(Shell.java:547) at org.apache.hadoop.util.Shell.getHadoopHomeDir(Shell.java:568) at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:591) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:688) at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:79) at org.apache.hadoop.conf.Configuration.getBoolean(Configuration.java:1712) at org.apache.hadoop.security.SecurityUtil.setConfigurationInternal(SecurityUtil.java:99) at org.apache.hadoop.security.SecurityUtil.<clinit>(SecurityUtil.java:88) at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:312) at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:300) at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:575) at org.apache.hadoop.mapreduce.task.JobContextImpl.<init>(JobContextImpl.java:72) at org.apache.hadoop.mapreduce.Job.<init>(Job.java:152) at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:195) at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:214) at WordCount.main(WordCount.java:65) Caused by: java.io.FileNotFoundException: Hadoop home directory D:\hadoop does not exist at org.apache.hadoop.util.Shell.checkHadoopHomeInner(Shell.java:490) at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:438) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:515) ... 12 more 2025-10-30 01:07:39,653 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(60)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2025-10-30 01:07:45,315 WARN [main] impl.MetricsConfig (MetricsConfig.java:loadFirst(136)) - Cannot locate configuration: tried hadoop-metrics2-jobtracker.properties,hadoop-metrics2.properties 2025-10-30 01:07:45,377 INFO [main] impl.MetricsSystemImpl (MetricsSystemImpl.java:startTimer(378)) - Scheduled Metric snapshot period at 10 second(s). 2025-10-30 01:07:45,377 INFO [main] impl.MetricsSystemImpl (MetricsSystemImpl.java:start(191)) - JobTracker metrics system started Exception in thread "main" java.lang.RuntimeException: java.io.FileNotFoundException: java.io.FileNotFoundException: Hadoop home directory D:\hadoop does not exist -see https://wiki.apache.org/hadoop/WindowsProblems at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:735) at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:270) at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:286) at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:978) at org.apache.hadoop.fs.RawLocalFileSystem.mkOneDirWithMode(RawLocalFileSystem.java:660) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:700) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:672) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:699) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:677) at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:336) at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:162) at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:113) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:148) at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1571) at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1568) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1878) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1568) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1589) at WordCount.main(WordCount.java:89) Caused by: java.io.FileNotFoundException: java.io.FileNotFoundException: Hadoop home directory D:\hadoop does not exist -see https://wiki.apache.org/hadoop/WindowsProblems at org.apache.hadoop.util.Shell.fileNotFoundException(Shell.java:547) at org.apache.hadoop.util.Shell.getHadoopHomeDir(Shell.java:568) at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:591) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:688) at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:79) at org.apache.hadoop.conf.Configuration.getBoolean(Configuration.java:1712) at org.apache.hadoop.security.SecurityUtil.setConfigurationInternal(SecurityUtil.java:99) at org.apache.hadoop.security.SecurityUtil.<clinit>(SecurityUtil.java:88) at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:312) at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:300) at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:575) at org.apache.hadoop.mapreduce.task.JobContextImpl.<init>(JobContextImpl.java:72) at org.apache.hadoop.mapreduce.Job.<init>(Job.java:152) at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:195) at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:214) at WordCount.main(WordCount.java:65) Caused by: java.io.FileNotFoundException: Hadoop home directory D:\hadoop does not exist at org.apache.hadoop.util.Shell.checkHadoopHomeInner(Shell.java:490) at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:438) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:515) ... 12 more 进程已结束,退出代码1
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