@Override public void run () { try { while (fsRunning && shouldNNRmRun) { checkAvailableResources(); if(!nameNodeHasResourcesAvailable()) { String lowResourcesMsg = "NameNode low on available disk space. "; if (!isInSafeMode()) { LOG.warn(lowResourcesMsg + "Entering safe mode."); } else { LOG.warn(lowResourcesMsg + "Already in safe mode."); } enterSafeMode(true); } try { Thread.sleep(resourceRecheckInterval); } catch (InterruptedException ie) { // Deliberately ignore } } } catch (Exception e) { FSNamesystem.LOG.error("Exception in NameNodeResourceMonitor: ", e); } }
boolean setSafeMode(SafeModeAction action) throws IOException { String operationName = action.toString().toLowerCase(); boolean error = false; if (action != SafeModeAction.SAFEMODE_GET) { checkSuperuserPrivilege(operationName); switch(action) { case SAFEMODE_LEAVE: // leave safe mode leaveSafeMode(false); break; case SAFEMODE_ENTER: // enter safe mode enterSafeMode(false); break; case SAFEMODE_FORCE_EXIT: leaveSafeMode(true); break; default: LOG.error("Unexpected safe mode action"); error = true; } } if (!error) { logAuditEvent(true, operationName, null); } return isInSafeMode(); }
@Override public void run () { try { while (fsRunning && shouldNNRmRun) { checkAvailableResources(); if(!nameNodeHasResourcesAvailable()) { String lowResourcesMsg = "NameNode low on available disk space. "; if (!isInSafeMode()) { LOG.warn(lowResourcesMsg + "Entering safe mode."); } else { LOG.warn(lowResourcesMsg + "Already in safe mode."); } enterSafeMode(true); } try { Thread.sleep(resourceRecheckInterval); } catch (InterruptedException ie) { // Deliberately ignore } } } catch (Exception e) { FSNamesystem.LOG.error("Exception in NameNodeResourceMonitor: ", e); } }
boolean setSafeMode(SafeModeAction action) throws IOException { if (action != SafeModeAction.SAFEMODE_GET) { checkSuperuserPrivilege(); switch (action) { case SAFEMODE_LEAVE: // leave safe mode if (!manualOverrideSafeMode) { leaveSafeMode(false); } else { LOG.warn("Leaving safemode is not allowed. " + manualOverrideSafeMode); } break; case SAFEMODE_ENTER: // enter safe mode enterSafeMode(); break; } } return isInSafeMode(); }
boolean setSafeMode(SafeModeAction action) throws IOException { if (action != SafeModeAction.SAFEMODE_GET) { checkSuperuserPrivilege(); switch(action) { case SAFEMODE_LEAVE: // leave safe mode leaveSafeMode(); break; case SAFEMODE_ENTER: // enter safe mode enterSafeMode(false); break; default: LOG.error("Unexpected safe mode action"); } } return isInSafeMode(); }
public static void enterSafeMode(NameNode namenode, boolean resourcesLow) throws IOException { namenode.getNamesystem().enterSafeMode(resourcesLow); }
boolean setSafeMode(SafeModeAction action) throws IOException { if (action != SafeModeAction.SAFEMODE_GET) { checkSuperuserPrivilege(); switch(action) { case SAFEMODE_LEAVE: // leave safe mode leaveSafeMode(false); break; case SAFEMODE_ENTER: // enter safe mode enterSafeMode(); break; } } return isInSafeMode(); }
boolean setSafeMode(SafeModeAction action) throws IOException { if (action != SafeModeAction.SAFEMODE_GET) { checkSuperuserPrivilege(); switch(action) { case SAFEMODE_LEAVE: // leave safe mode leaveSafeMode(); break; case SAFEMODE_ENTER: // enter safe mode enterSafeMode(false); break; default: LOG.error("Unexpected safe mode action"); } } return isInSafeMode(); }
@Override public void run () { try { while (fsRunning && shouldNNRmRun) { checkAvailableResources(); if(!nameNodeHasResourcesAvailable()) { String lowResourcesMsg = "NameNode low on available disk space. "; if (!isInSafeMode()) { LOG.warn(lowResourcesMsg + "Entering safe mode."); } else { LOG.warn(lowResourcesMsg + "Already in safe mode."); } enterSafeMode(true); } try { Thread.sleep(resourceRecheckInterval); } catch (InterruptedException ie) { // Deliberately ignore } } } catch (Exception e) { FSNamesystem.LOG.error("Exception in NameNodeResourceMonitor: ", e); } }
namesystem.enterSafeMode();
@Test public void testReplQueuesActiveAfterStartupSafemode() throws IOException, InterruptedException{ Configuration conf = new Configuration(); FSEditLog fsEditLog = Mockito.mock(FSEditLog.class); FSImage fsImage = Mockito.mock(FSImage.class); Mockito.when(fsImage.getEditLog()).thenReturn(fsEditLog); FSNamesystem fsNamesystem = new FSNamesystem(conf, fsImage); FSNamesystem fsn = Mockito.spy(fsNamesystem); //Make shouldPopulaeReplQueues return true HAContext haContext = Mockito.mock(HAContext.class); HAState haState = Mockito.mock(HAState.class); Mockito.when(haContext.getState()).thenReturn(haState); Mockito.when(haState.shouldPopulateReplQueues()).thenReturn(true); Whitebox.setInternalState(fsn, "haContext", haContext); //Make NameNode.getNameNodeMetrics() not return null NameNode.initMetrics(conf, NamenodeRole.NAMENODE); fsn.enterSafeMode(false); assertTrue("FSNamesystem didn't enter safemode", fsn.isInSafeMode()); assertTrue("Replication queues were being populated during very first " + "safemode", !fsn.isPopulatingReplQueues()); fsn.leaveSafeMode(); assertTrue("FSNamesystem didn't leave safemode", !fsn.isInSafeMode()); assertTrue("Replication queues weren't being populated even after leaving " + "safemode", fsn.isPopulatingReplQueues()); fsn.enterSafeMode(false); assertTrue("FSNamesystem didn't enter safemode", fsn.isInSafeMode()); assertTrue("Replication queues weren't being populated after entering " + "safemode 2nd time", fsn.isPopulatingReplQueues()); }
@Test /** * Test that isInStartupSafemode returns true only during startup safemode * and not also during low-resource safemode */ public void testStartupSafemode() throws IOException { Configuration conf = new Configuration(); FSImage fsImage = Mockito.mock(FSImage.class); FSEditLog fsEditLog = Mockito.mock(FSEditLog.class); Mockito.when(fsImage.getEditLog()).thenReturn(fsEditLog); FSNamesystem fsn = new FSNamesystem(conf, fsImage); fsn.leaveSafeMode(); assertTrue("After leaving safemode FSNamesystem.isInStartupSafeMode still " + "returned true", !fsn.isInStartupSafeMode()); assertTrue("After leaving safemode FSNamesystem.isInSafeMode still returned" + " true", !fsn.isInSafeMode()); fsn.enterSafeMode(true); assertTrue("After entering safemode due to low resources FSNamesystem." + "isInStartupSafeMode still returned true", !fsn.isInStartupSafeMode()); assertTrue("After entering safemode due to low resources FSNamesystem." + "isInSafeMode still returned false", fsn.isInSafeMode()); }
fsns.enterSafeMode(false); fsns.saveNamespace(); fsns.leaveSafeMode();
namesystem.enterSafeMode(false);
fsn.enterSafeMode(false); fsn.saveNamespace(); fsn.leaveSafeMode();