Examples of com.sleepycat.je.EnvironmentFailureException

com.sleepycat.je.EnvironmentFailureException
Indicates that a failure has occurred that could impact the {@code Environment} as a whole. For failures that impact only the currentoperation and/or transaction, see {@link OperationFailureException}). For an overview of all exceptions thrown by JE, see {@link DatabaseException}.
Depending on the nature of the failure, this exception may indicate that {@link Environment#close} must be called. The application should catch{@code EnvironmentFailureException} and then call {@link Environment#isValid}. If {@code false} is returned, all {@code Environment}handles (instances) must be closed and re-opened in order to run recovery and continue operating. If {@code true} is returned, the {@code Environment} can continue operating without being closed and re-opened.Also note that {@link Environment#isValid} may be called at any time, notjust during exception handling.

The use of the {@link Environment#isValid} method allows JE to determinedynamically whether the failure requires recovery or not, and allows for this determination to change in future releases. Over time, internal improvements to error handling may allow more error conditions to be handled without invalidating the {@code Environment}.

(Although this exception class extends {@link RunRecoveryException}, it does not always indicate that recovery is necessary, as described above. {@code RunRecoveryException} has been deprecated and {@code EnvironmentFailureException} should be used instead.)
If an {@code EnvironmentFailureException} consistently occurs soon afteropening the Environment, this may indicate a persistent problem. It may indicate a system problem or a persistent storage problem. In this case, human intervention is normally required and restoring from a backup may be necessary.

Note that subclasses of {@code EnvironmentFailureException} indicate howto handle the exception in more specific ways.
- If {@code Thread.interrupt} is called for a thread performing JEoperations, a {@link ThreadInterruptedException} is thrown. Sinceinterrupting a thread is intentional, it does not indicate a persistent problem and human intervention is not normally required.
- If an {@code IOException} occurs while writing to the JE log, a{@link LogWriteException} is thrown. Although an {@code IOException} canoccur for different reasons, it is a hint that the disk may be full and applications may wish to attempt recovery after making more disk space available.
- For replicated environments, see the subclasses of {@code EnvironmentFailureException} in the {@link com.sleepycat.je.rep} package formore information. Such exceptions may require special handling.
If {@link Environment#close} is not called after an {@code EnvironmentFailureException} invalidates the {@code Environment}, all subsequent method calls for the {@code Environment} will throw the sameexception. This provides more than one opportunity to catch and handle the specific exception subclass that caused the failure.

            electionThread.join();


            final Exception exception =
                electionThread.getSavedShutdownException();
            if (exception != null) {
                throw new EnvironmentFailureException
                (envImpl,
                 EnvironmentFailureReason.UNEXPECTED_EXCEPTION,
                 exception);
            }
        }

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                 "Expected log version " + LogEntryType.LOG_VERSION +
                 " or earlier but found " + logVersion);
        }


        if (fileNum != expectedFileNum) {
            throw new EnvironmentFailureException
                (envImpl, EnvironmentFailureReason.LOG_INTEGRITY,
                 "Wrong filenum in header for file " +
                 fileName + " expected " +
                 expectedFileNum + " got " + fileNum);
        }

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     */
    private void verifyCursor(BIN bin)
        throws DatabaseException {


        if (!bin.getCursorSet().contains(this)) {
            throw new EnvironmentFailureException
                (databaseImpl.getDbEnvironment(),
                 EnvironmentFailureReason.UNEXPECTED_STATE,
                 "BIN cursorSet is inconsistent");
        }
    }

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     */
    public boolean readNextEntry() {
        try {
            return readNextEntryAllowExceptions();
        } catch (FileNotFoundException e) {
            throw new EnvironmentFailureException
                (envImpl,
                 EnvironmentFailureReason.LOG_FILE_NOT_FOUND, e);
        } catch (ChecksumException e) {
            throw new EnvironmentFailureException
                (envImpl, EnvironmentFailureReason.LOG_CHECKSUM, e);
        }
    }

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                    if (!resyncReader(DbLsn.makeLsn
                                      (prevFileNum.longValue(),
                                       DbLsn.MAX_FILE_OFFSET),
                                      false)) {
                        throw new EnvironmentFailureException
                            (envImpl,
                             EnvironmentFailureReason.LOG_INTEGRITY,
                             "Cannot read backward over cleaned file" +
                             " from " + window.currentFileNum() +
                             " to " + prevFileNum);

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                        (cursor.searchAndPosition(keyDbt, SearchMode.SET,
                                                  LockType.WRITE) &
                         CursorImpl.FOUND) != 0;
                    if (!searchOk) {
                        if (mustExist) {
                            throw new EnvironmentFailureException
                                (envImpl,
                                 EnvironmentFailureReason.LOG_INTEGRITY,
                                 "Can't find database ID: " + db.getId());
                        }
                        /* Do nothing silently. */

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                 * Create the exception to invalidate the environment, but do
                 * not throw it since the handle is invoked in some internal
                 * JVM thread and the exception is not meaningful to the
                 * invoker.
                 */
                new EnvironmentFailureException
                    (envImpl, EnvironmentFailureReason.UNCAUGHT_EXCEPTION, e);
            }
        }

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        try {
            return fetchLSN(lsn, lnKeyEntry, pendingLSNs);
        } catch (FileNotFoundException e) {
            if (excPredicate == null ||
                !excPredicate.ignoreException(e)) {
                dbe = new EnvironmentFailureException
                    (envImpl,
                     EnvironmentFailureReason.LOG_FILE_NOT_FOUND, e);
            }
        } catch (DatabaseException e) {
            if (excPredicate == null ||

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        try {
            callback.processLSN(childLSN, childType, theNode, lnKey);
        } catch (FileNotFoundException e) {
            if (excPredicate == null ||
                !excPredicate.ignoreException(e)) {
                dbe = new EnvironmentFailureException
                    (envImpl,
                     EnvironmentFailureReason.LOG_FILE_NOT_FOUND, e);
            }
        } catch (DatabaseException e) {
            if (excPredicate == null ||

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                repNode.getRepImpl().invalidate(e);
            } catch (ChecksumException e) {
                shutdownException = e;


                /* An internal, unexpected error. Invalidate the environment. */
                throw new EnvironmentFailureException
                    (repNode.getRepImpl(),
                     EnvironmentFailureReason.LOG_CHECKSUM, e);
            } catch (RuntimeException e) {
                shutdownException = e;

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com.sleepycat.je.cleaner.Cleaner

com.sleepycat.je.cleaner.FileProcessor

com.sleepycat.je.cleaner.VerifyUtils

com.sleepycat.je.dbi.CursorImpl

com.sleepycat.je.dbi.DbTree

com.sleepycat.je.dbi.EnvironmentImpl

com.sleepycat.je.dbi.SortedLSNTreeWalker

com.sleepycat.je.dbi.StartupTracker

com.sleepycat.je.log.FileHeader

com.sleepycat.je.log.FileManager

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