[
https://issues.apache.org/jira/browse/AXIOM-438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Masaki Nishikawa closed AXIOM-438.
----------------------------------
> StringIndexOutOfBoundsException occur on rare occasions is when you create a
> stub object
> ----------------------------------------------------------------------------------------
>
> Key: AXIOM-438
> URL: https://issues.apache.org/jira/browse/AXIOM-438
> Project: Axiom
> Issue Type: Bug
> Components: API
> Affects Versions: 1.2.10
> Environment: Linux
> Reporter: Masaki Nishikawa
> Priority: Trivial
>
> (Google Translated)
> There is a problem with the logic of UUIDGenerator.getInitialUUID, is rare,
> can occur when generating the object of the stub is
> StringIndexOutOfBoundsException.
> The cause is because the next "1" s number, places such as "01" when over a
> string of numeric Integer.toHexString will decrease.
> What are you handling this like why, I do not understand, what the problem be
> solved by simply zero-fill?
> We appreciate if you fix this bug.
> 【The appropriate program】
> public class UUIDGenerator {
> /* Omitted */
> protected static String getInitialUUID() {
> if (myRand == null) {
> myRand = new Random();
> }
> long rand = myRand.nextLong();
> String sid;
> try {
> sid = InetAddress.getLocalHost().toString();
> } catch (UnknownHostException e) {
> sid = Thread.currentThread().getName();
> }
> StringBuffer sb = new StringBuffer();
> sb.append(sid);
> sb.append(":");
> sb.append(Long.toString(rand));
> MessageDigest md5 = null;
> try {
> md5 = MessageDigest.getInstance("MD5");
> } catch (NoSuchAlgorithmException e) {
> throw new OMException(e);
> }
> md5.update(sb.toString().getBytes());
> byte[] array = md5.digest();
> StringBuffer sb2 = new StringBuffer();
> for (int j = 0; j < array.length; ++j) {
> int b = array[j] & 0xFF;
> sb2.append(Integer.toHexString(b)); // The problem here! Is a
> string of "1" the number "01" is Integer.toHexString, reduce the number of
> digits is
> }
> int begin = myRand.nextInt();
> if (begin < 0) begin = begin * -1;
> begin = begin % 8;
> return sb2.toString().substring(begin, begin + 18).toUpperCase(); //
> Is raised here StringIndexOutofBoundsException
> }
> /* Omitted */
> }
> 【Error Trace】
> java.lang.StringIndexOutOfBoundsException: String index out of range: 25
> at java.lang.String.substring(Unknown Source)
> at
> org.apache.axiom.om.util.UUIDGenerator.getInitialUUID(UUIDGenerator.java:94)
> at org.apache.axiom.om.util.UUIDGenerator.getUUID(UUIDGenerator.java:54)
> at
> org.apache.axis2.description.AxisOperation.<init>(AxisOperation.java:90)
> at
> org.apache.axis2.description.AxisOperation.<init>(AxisOperation.java:95)
> at
> org.apache.axis2.description.TwoChannelAxisOperation.<init>(TwoChannelAxisOperation.java:52)
> at
> org.apache.axis2.description.OutInAxisOperation.<init>(OutInAxisOperation.java:65)
> at
> org.apache.axis2.description.RobustOutOnlyAxisOperation.<init>(RobustOutOnlyAxisOperation.java:47)
> at org.apache.axis2.client.Stub.addAnonymousOperations(Stub.java:233)
>
> （原文）
> UUIDGenerator.getInitialUUIDのロジックに問題があり、ごく稀にですが、スタブのオブジェクト生成時にStringIndexOutOfBoundsExceptionが発生します。
> 原因はInteger.toHexStringで数値を文字列化する際に"01"のような数値だと"1"となり、桁数が減ってしまうためです。
> なぜこのような処理をしているのか、理解できていないのですが、単純に0埋めすれば解決する問題でしょうか？
> このバグを修正していただけると幸いです。
> 【該当プログラム】
> public class UUIDGenerator {
> /* 省略 */
> protected static String getInitialUUID() {
> if (myRand == null) {
> myRand = new Random();
> }
> long rand = myRand.nextLong();
> String sid;
> try {
> sid = InetAddress.getLocalHost().toString();
> } catch (UnknownHostException e) {
> sid = Thread.currentThread().getName();
> }
> StringBuffer sb = new StringBuffer();
> sb.append(sid);
> sb.append(":");
> sb.append(Long.toString(rand));
> MessageDigest md5 = null;
> try {
> md5 = MessageDigest.getInstance("MD5");
> } catch (NoSuchAlgorithmException e) {
> throw new OMException(e);
> }
> md5.update(sb.toString().getBytes());
> byte[] array = md5.digest();
> StringBuffer sb2 = new StringBuffer();
> for (int j = 0; j < array.length; ++j) {
> int b = array[j] & 0xFF;
> sb2.append(Integer.toHexString(b)); //
> ここが問題！Integer.toHexStringで"01"の数値が"1"の文字列になり、桁数が減る
> }
> int begin = myRand.nextInt();
> if (begin < 0) begin = begin * -1;
> begin = begin % 8;
> return sb2.toString().substring(begin, begin + 18).toUpperCase(); //
> ここでStringIndexOutofBoundsExceptionが発生
> }
> /* 省略 */
> }
> 【トレース内容】
> java.lang.StringIndexOutOfBoundsException: String index out of range: 25
> at java.lang.String.substring(Unknown Source)
> at
> org.apache.axiom.om.util.UUIDGenerator.getInitialUUID(UUIDGenerator.java:94)
> at org.apache.axiom.om.util.UUIDGenerator.getUUID(UUIDGenerator.java:54)
> at
> org.apache.axis2.description.AxisOperation.<init>(AxisOperation.java:90)
> at
> org.apache.axis2.description.AxisOperation.<init>(AxisOperation.java:95)
> at
> org.apache.axis2.description.TwoChannelAxisOperation.<init>(TwoChannelAxisOperation.java:52)
> at
> org.apache.axis2.description.OutInAxisOperation.<init>(OutInAxisOperation.java:65)
> at
> org.apache.axis2.description.RobustOutOnlyAxisOperation.<init>(RobustOutOnlyAxisOperation.java:47)
> at org.apache.axis2.client.Stub.addAnonymousOperations(Stub.java:233)
>
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@ws.apache.org
For additional commands, e-mail: dev-h...@ws.apache.org
